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                        Challenging Sudoku Puzzles - Book 1
                                     From www.veryfreesudoku.com


               Sudoku Puzzle 1                 1            6        7        5
                                                    4                    6
                                               3                1        7
                                                                         9    4
                                               9                5 3
                                                                2
                                                            2 6 7
                                                              2     4 8
                                               6              9   8 1   2

                 1               4                              Sudoku Puzzle 2
                       7                         9 6
           3                 8
           2           1                    5 3
           5                     7            8
           4           8 3
                                       1                3
                                 6                      4
           1 9 2                                        8
Challenging Sudoku Puzzles - Book 1
                    From www.veryfreesudoku.com


    Sudoku Puzzle 3                    5          4
                                   9                  7   8
                                       4 5                    3
                                          2 5
                              6             4
                              1   2       8   7
                                    9   5 3
                                        2
                                7     8 3 5

            1                                Sudoku Puzzle 4
                           6 5 4
     8 5 6                 2
                  2
4       3       9 8       7
5                         2
                      7 4 1
       7                3
     1 8        4
Challenging Sudoku Puzzles - Book 1
                From www.veryfreesudoku.com


 Sudoku Puzzle 5          5           3 1
                          1       2   4   5
                            4       5   6
                          2 3 5   9   6
                            7           4
                                3     9
                                    1
                            6   9
                                      5   7

  2         1            7               Sudoku Puzzle 6
            7          3 5
1 3      6
         1 8                2
3 8
5   9
  6               2        4
            4              7
                       1 9 8
Challenging Sudoku Puzzles - Book 1
                   From www.veryfreesudoku.com


    Sudoku Puzzle 7           9                      3       4
                              5                2     7
                              3                            9
                                           5         8 2 1 7
                                   1                   6
                                   4
                                                   8     9
                              1                    2
                                   8               7 5 4

               1       3                       Sudoku Puzzle 8
           7         8 4 9 5
                           6
9
    3 1                        8
      3 2                 9
    2                          7
  6 4   5                              8
7   8                                  1
Challenging Sudoku Puzzles - Book 1
                     From www.veryfreesudoku.com


    Sudoku Puzzle 9                      1 9
                                         4         2 1
                                7        5         4   6
                                     3               8
                                     7       6              5
                                                 5 4 2
                                                   3 1
                                     5             7   8
                                             8 9 7

         9       3          8                Sudoku Puzzle 10
1        3                       7
             7              5
     9                 7
             3
     7       5 8 6 2
         8   6     5
           1 2     6
         6     3     1
Challenging Sudoku Puzzles - Book 1
                     From www.veryfreesudoku.com


    Sudoku Puzzle 11                    9                      6

                                5 3                2       8
                                6 7                    9       3
                                                       1       9
                                     4 8
                                             7         6       1
                                                       2           7
                                4 8                                2

     6                           3           Sudoku Puzzle 12
8                7          2
             1         8
  7                    2
1 2 5 9 6
                       3
                 8       4   7
5        4             9 8 2
         8
Challenging Sudoku Puzzles - Book 1
                   From www.veryfreesudoku.com


    Sudoku Puzzle 13                             1 5
                              9
                                  4 9 3       7
                                5   7       1
                              1   3 6   2
                                2
                              7         9 4   1
                                        3
                                  6 4     2

                     4         7           Sudoku Puzzle 14
     5     2         9         1
8        6 1                        5
6 2                       8
         1     7 6
                                    9
5                    3
               1
1 6 4                          3 7
Challenging Sudoku Puzzles - Book 1
                 From www.veryfreesudoku.com


    Sudoku Puzzle 15            6                         1
                                2                             8
                                        5             3
                           3                      5
                                        4       2 6       5 7
                                            8             6
                                                          8
                                5             1             2
                           9                5 7       6

                        6 5                 Sudoku Puzzle 16
5     4 8                           3
    1   2
    4 6                             7
  8     5
3 7 9
  4     1 8                  9 5
                        7
     1      5           3 8
Challenging Sudoku Puzzles - Book 1
                 From www.veryfreesudoku.com


    Sudoku Puzzle 17
                                               2 4       9
                            4 2                  3 7
                                         8
                                7              5   9 6
                                5              7         8
                                1 6
                            9                    1 4 5
                                8              6   3   1

8                                        Sudoku Puzzle 18
     43                 1
      4            9
  3 6 1                             8
  1                2 3
5     9            8
  7   5 9          3 2
                                    9
         4         1 6
Challenging Sudoku Puzzles - Book 1
                                     From www.veryfreesudoku.com


        Sudoku Puzzle 1                         Sudoku Puzzle 2                      Sudoku Puzzle 3
1   9    6   3   8   7   2   4   5      9   1    5   6   4   3   8   7   2   3   1   5   8   4   6   7   2   9
8   4    7   5   9   2   6   1   3      8   4    7   1   5   2   3   9   6   2   9   6   3   1   7   4   8   5
3   2    5   1   6   4   7   9   8      3   2    6   8   9   7   1   4   5   7   8   4   5   2   9   6   1   3
2   3    8   7   1   6   9   5   4      2   6    1   4   8   9   5   3   7   9   4   8   7   3   1   2   5   6
9   6    1   4   5   3   8   2   7      5   3    9   2   7   6   4   8   1   6   3   7   2   5   8   9   4   1
5   7    4   8   2   9   3   6   1      4   7    8   3   1   5   6   2   9   1   5   2   6   9   4   8   3   7
4   8    2   6   7   1   5   3   9      6   8    4   7   2   1   9   5   3   8   2   1   9   6   5   3   7   4
7   1    9   2   3   5   4   8   6      7   5    3   9   6   8   2   1   4   5   6   3   4   7   2   1   9   8
6   5    3   9   4   8   1   7   2      1   9    2   5   3   4   7   6   8   4   7   9   1   8   3   5   6   2




        Sudoku Puzzle 4                         Sudoku Puzzle 5                      Sudoku Puzzle 6
9   6    4   1   2   5   7   3   8      5   8    7   4   6   9   3   1   2   4   2   5   3   1   8   6   7   9
1   3    2   7   8   9   6   5   4      1   9    6   7   2   3   4   8   5   6   9   8   2   7   4   3   5   1
7   8    5   6   3   4   2   9   1      3   4    2   1   8   5   7   6   9   1   3   7   6   5   9   8   4   2
8   7    6   3   1   2   9   4   5      2   3    5   8   9   4   6   7   1   7   4   6   1   8   5   9   2   3
4   2    3   5   9   8   1   7   6      9   7    8   5   1   6   2   4   3   3   8   2   9   6   7   4   1   5
5   9    1   4   7   6   8   2   3      6   1    4   3   7   2   9   5   8   5   1   9   4   2   3   7   8   6
3   5    9   8   6   7   4   1   2      7   5    9   2   4   1   8   3   6   8   6   1   7   9   2   5   3   4
6   4    7   2   5   1   3   8   9      8   6    3   9   5   7   1   2   4   9   5   3   8   4   1   2   6   7
2   1    8   9   4   3   5   6   7      4   2    1   6   3   8   5   9   7   2   7   4   5   3   6   1   9   8




        Sudoku Puzzle 7                         Sudoku Puzzle 8                      Sudoku Puzzle 9
9   7    1   8   6   3   5   2   4      4   8    6   5   1   9   3   2   7   2   6   1   9   7   3   5   8   4
5   6    4   2   9   7   3   8   1      2   3    1   7   6   8   4   9   5   3   8   4   5   6   2   1   9   7
3   2    8   5   4   1   7   6   9      5   7    9   2   4   3   8   1   6   7   9   5   1   8   4   2   6   3
6   9    5   4   3   8   2   1   7      9   2    5   8   7   4   1   6   3   5   3   6   2   4   9   8   7   1
8   1    2   7   5   9   6   4   3      6   4    3   1   9   5   7   8   2   4   7   2   6   1   8   9   3   5
7   4    3   6   1   2   9   5   8      8   1    7   3   2   6   9   5   4   9   1   8   7   3   5   4   2   6
4   5    7   3   8   6   1   9   2      3   5    2   4   8   1   6   7   9   8   2   7   4   5   6   3   1   9
1   3    6   9   2   4   8   7   5      1   6    4   9   5   7   2   3   8   6   5   9   3   2   1   7   4   8
2   8    9   1   7   5   4   3   6      7   9    8   6   3   2   5   4   1   1   4   3   8   9   7   6   5   2
Challenging Sudoku Puzzles - Book 1
                                     From www.veryfreesudoku.com


        Sudoku Puzzle 10                        Sudoku Puzzle 11                     Sudoku Puzzle 12
7   5    9   2   3   1   8   4   6      8   2    9   5   1   4   7   6   3   9   6    7   2   4   5   1   3   8
1   8    3   4   5   6   9   7   2      7   1    4   3   6   8   5   2   9   8   5    1   3   7   6   2   4   9
6   2    4   7   8   9   5   1   3      5   3    6   9   2   7   8   4   1   3   4    2   1   9   8   6   7   5
8   9    2   6   4   7   1   3   5      6   7    1   8   4   9   2   3   5   4   7    3   8   5   2   9   6   1
4   6    5   3   1   2   7   8   9      3   5    2   6   7   1   4   9   8   1   2    5   9   6   7   3   8   4
3   7    1   5   9   8   6   2   4      9   4    8   2   3   5   1   7   6   6   8    9   4   1   3   7   5   2
2   1    8   9   6   4   3   5   7      2   9    5   7   8   6   3   1   4   2   3    6   5   8   1   4   9   7
9   3    7   1   2   5   4   6   8      1   6    3   4   5   2   9   8   7   5   1    4   7   3   9   8   2   6
5   4    6   8   7   3   2   9   1      4   8    7   1   9   3   6   5   2   7   9    8   6   2   4   5   1   3




        Sudoku Puzzle 13                        Sudoku Puzzle 14                     Sudoku Puzzle 15
3   7    2   8   4   1   5   6   9      2   1    9   5   8   4   6   7   3   8   6    3   9   5   7   2   1   4
9   6    1   5   2   7   8   3   4      7   5    3   2   6   9   4   1   8   4   2    9   1   6   3   5   7   8
5   8    4   9   3   6   1   2   7      8   4    6   1   3   7   9   2   5   7   1    5   2   8   4   3   9   6
6   5    8   7   9   4   3   1   2      6   2    7   3   9   5   8   4   1   3   8    6   7   4   5   1   2   9
1   9    3   6   5   2   7   4   8      9   8    1   4   7   6   3   5   2   1   9    4   3   2   6   8   5   7
4   2    7   3   1   8   9   5   6      4   3    5   8   2   1   7   6   9   5   7    2   8   9   1   4   6   3
7   3    5   2   6   9   4   8   1      5   9    2   7   4   3   1   8   6   2   4    1   6   3   9   7   8   5
2   4    9   1   8   3   6   7   5      3   7    8   6   1   2   5   9   4   6   5    7   4   1   8   9   3   2
8   1    6   4   7   5   2   9   3      1   6    4   9   5   8   2   3   7   9   3    8   5   7   2   6   4   1




        Sudoku Puzzle 16                        Sudoku Puzzle 17                     Sudoku Puzzle 18
4   3    8   1   7   9   6   5   2      7   9    3   5   1   8   6   2   4   8   6    2   7   1   5   9   4   3
5   9    2   4   8   6   1   7   3      8   6    5   7   2   4   1   3   9   7   4    9   3   8   6   1   5   2
7   6    1   3   2   5   9   4   8      4   2    1   6   9   3   7   8   5   1   5    3   4   2   9   8   7   6
2   5    4   6   9   3   8   1   7      6   4    2   8   3   9   5   1   7   9   3    6   1   4   7   5   2   8
1   8    6   2   5   7   4   3   9      1   7    8   4   5   2   9   6   3   4   1    8   6   5   2   3   9   7
3   7    9   8   4   1   5   2   6      3   5    9   1   7   6   2   4   8   5   2    7   9   3   8   4   6   1
6   4    3   7   1   8   2   9   5      5   1    6   3   4   7   8   9   2   6   7    1   5   9   3   2   8   4
8   2    5   9   3   4   7   6   1      9   3    7   2   8   1   4   5   6   3   8    5   2   6   4   7   1   9
9   1    7   5   6   2   3   8   4      2   8    4   9   6   5   3   7   1   2   9    4   8   7   1   6   3   5
Challenging Sudoku Puzzles - Book 10
                  From www.veryfreesudoku.com


    Sudoku Puzzle 1                                 7           9
                             2        7 8           3
                                      6 4                   3 7
                                                8
                                  4 5 9                 2
                                                              5
                                  5                 2       7 6
                                  1       3             9
                                      2                     5

                 1 7                       Sudoku Puzzle 2
             9                7 4
         9          6           2
4        7                    6
         6          3
         8                    5
                         2
             7 3 2            8
     5         8              4 1
Challenging Sudoku Puzzles - Book 10
                     From www.veryfreesudoku.com


    Sudoku Puzzle 3                          4 1         7
                                                     9         5
                                     3           2             7
                                             1               8 2
                                             5           1
                               8             7               6 4
                                                             5
                               2                                 6
                                             6 5         9     8 2

         7                  2 5                  Sudoku Puzzle 4
     9       6                           7
                 1 8
         5       9 4 1                   8
     7                           9
             3
                                         1
5                      3         4
     8           7
Challenging Sudoku Puzzles - Book 10
                From www.veryfreesudoku.com


    Sudoku Puzzle 5             1 9               7
                                    7           2 4
                                    1             5       3
                                3 1 2                 4
                                  4   6
                           5                    4 8
                                                      2
                                7
                                6 5           7 9

6             4 3                        Sudoku Puzzle 6
        3 8                 2
          7                 6
3                           4
9                 6         1
        8 3 2
          5            7
                       1         8
4 8                         3
Challenging Sudoku Puzzles - Book 10
             From www.veryfreesudoku.com


 Sudoku Puzzle 7            4        3           5
                                           2         3 9
                                5          1 6
                       4 3                   1
                                1            2       7
                                     8             3
                                             3 9 6 4
                                     2         7   8
                       6

            4 2                       Sudoku Puzzle 8
        7 3   6 5
      6         7
7 4 5           1
    8
  6   4 2 5
    2
      5   9 1
6 3   1
Challenging Sudoku Puzzles - Book 10
                    From www.veryfreesudoku.com


    Sudoku Puzzle 9                5                        4
                               2 3 8
                               7 9                          8 2
                                                  6 3         9
                               4            1           2
                                                  9
                               8            9           1       3
                                       1                8
                                                  7     4

                  7 1                       Sudoku Puzzle 10
     8          9   6
2                 6   5
3           2
     1          6               4 9
     4                3         7
     7      1 5                 2
5                                 4
                           7
Challenging Sudoku Puzzles - Book 10
                 From www.veryfreesudoku.com


    Sudoku Puzzle 11            1                          7
                           8                               3
                                         2 4 6             8
                                                       2
                                                   9
                           3 7           5
                                               7       3       6
                                    2              8           9
                                5                      1 2

            1   6 5 7                    Sudoku Puzzle 12
        5           3
2                 1   9
3                   8
  2 6         7 9     1
    9           5
5   2       3   7   9
              9
            4
Challenging Sudoku Puzzles - Book 10
                     From www.veryfreesudoku.com


    Sudoku Puzzle 13                 8              1               6
                                                                    4
                                     4 1                    2       7
                                                        2
                               8                 1 3            5
                               5                        7
                                     7 9 8                      4
                               3
                                             4          6       3

8                                        6       Sudoku Puzzle 14
     6             8 3 9
3        9       2     4
2        3           4
9        1 4
                       5
             7         6                 8
                 3               1
         4
Challenging Sudoku Puzzles - Book 10
                 From www.veryfreesudoku.com


 Sudoku Puzzle 15          7
                                     4             5 6
                                                     5 8
                           3             7
                                 1       4         8 3
                                     6                   4
                           5 9                     1
                                     1         8           5
                                 6             4         3 2

8 4     1               3                Sudoku Puzzle 16
2   6 7                 1   4
                        2 5
         6              9   5
             3
  3 1        9               7

       3 4              6 8
     3 9                5
Challenging Sudoku Puzzles - Book 10
              From www.veryfreesudoku.com


 Sudoku Puzzle 17                  2        6          4
                                       5
                                                   5 6
                        9     3 4                    5
                          6 3   7
                        2   8   9
                          3   1 8                  6
                              4                        9
                          7                            8

8 6             7                      Sudoku Puzzle 18
  9     3                      5
3       6
      2 7       8 4 3

                6   8
      8           1 2 9
4 3               8
                1 5
Challenging Sudoku Puzzles - Book 10
                                     From www.veryfreesudoku.com


        Sudoku Puzzle 1                         Sudoku Puzzle 2                      Sudoku Puzzle 3
4   3    1   6   5   7   8   2   9      2   4    5   8   1   7   9   3   6   5   8   4   1   3   7   2   6   9
2   9    7   8   1   3   5   6   4      3   6    1   9   2   5   8   7   4   7   6   2   4   9   8   1   5   3
5   8    6   4   2   9   1   3   7      8   7    9   3   4   6   5   1   2   1   3   9   2   6   5   4   7   8
6   2    9   5   8   1   7   4   3      4   2    7   5   9   8   1   6   3   3   9   1   7   4   6   8   2   5
3   4    5   9   7   6   2   1   8      5   9    6   1   7   3   4   2   8   6   4   5   8   2   1   9   3   7
1   7    8   2   3   4   6   9   5      1   3    8   2   6   4   7   5   9   8   2   7   9   5   3   6   4   1
8   5    3   1   9   2   4   7   6      6   8    3   4   5   1   2   9   7   9   7   3   6   8   2   5   1   4
7   1    4   3   6   5   9   8   2      9   1    4   7   3   2   6   8   5   2   5   8   3   1   4   7   9   6
9   6    2   7   4   8   3   5   1      7   5    2   6   8   9   3   4   1   4   1   6   5   7   9   3   8   2




        Sudoku Puzzle 4                         Sudoku Puzzle 5                      Sudoku Puzzle 6
8   1    7   4   3   9   2   5   6      4   1    9   8   3   5   7   6   2   6   1   9   2   4   3   5   8   7
4   9    3   6   2   5   8   1   7      3   5    6   7   9   2   4   1   8   7   5   3   8   6   9   4   2   1
6   5    2   7   1   8   9   3   4      7   8    2   1   4   6   5   9   3   8   2   4   7   1   5   3   6   9
3   6    5   2   9   4   1   7   8      6   3    1   2   8   7   9   4   5   3   6   1   9   7   8   2   4   5
2   7    8   1   5   6   4   9   3      8   9    4   5   6   3   2   7   1   9   7   2   4   5   6   8   1   3
1   4    9   3   8   7   6   2   5      5   2    7   9   1   4   8   3   6   5   4   8   3   2   1   9   7   6
7   3    6   9   4   2   5   8   1      9   4    8   6   5   1   3   2   7   1   3   6   5   8   2   7   9   4
5   2    1   8   6   3   7   4   9      1   7    3   4   2   8   6   5   9   2   9   7   6   3   4   1   5   8
9   8    4   5   7   1   3   6   2      2   6    5   3   7   9   1   8   4   4   8   5   1   9   7   6   3   2




        Sudoku Puzzle 7                         Sudoku Puzzle 8                      Sudoku Puzzle 9
2   4    9   3   7   8   5   1   6      5   7    6   9   1   8   4   2   3   6   1   5   3   8   2   9   4   7
1   7    6   4   2   5   8   3   9      8   1    4   2   7   3   9   6   5   2   3   8   7   4   9   5   6   1
3   8    5   9   1   6   2   4   7      2   9    3   6   5   4   8   1   7   7   9   4   5   1   6   3   8   2
4   3    7   5   9   1   6   8   2      7   4    5   8   3   6   2   9   1   1   8   2   4   6   3   7   5   9
8   9    1   6   3   2   4   7   5      3   2    8   7   9   1   5   4   6   4   6   9   1   5   7   2   3   8
5   6    2   8   4   7   1   9   3      9   6    1   4   2   5   3   7   8   3   5   7   2   9   8   6   1   4
7   2    8   1   5   3   9   6   4      1   5    2   3   4   7   6   8   9   8   4   6   9   2   5   1   7   3
9   1    3   2   6   4   7   5   8      4   8    7   5   6   9   1   3   2   9   7   1   6   3   4   8   2   5
6   5    4   7   8   9   3   2   1      6   3    9   1   8   2   7   5   4   5   2   3   8   7   1   4   9   6
Challenging Sudoku Puzzles - Book 10
                                     From www.veryfreesudoku.com


        Sudoku Puzzle 10                        Sudoku Puzzle 11                     Sudoku Puzzle 12
6   5    3   4   2   7   1   9   8      6   1    9   8   3   5   4   7   2   9   3    4   1   2   6   5   7   8
7   8    4   5   9   1   6   3   2      8   2    4   9   1   7   6   3   5   1   7    5   9   8   4   2   3   6
2   9    1   3   8   6   4   5   7      5   3    7   2   4   6   9   8   1   2   6    8   7   5   3   1   4   9
3   6    7   2   4   9   5   8   1      9   8    5   4   6   3   2   1   7   3   5    7   6   4   1   9   8   2
8   1    2   7   6   5   3   4   9      2   4    1   7   8   9   5   6   3   4   2    6   8   7   9   3   5   1
9   4    5   8   1   3   2   7   6      3   7    6   5   2   1   8   9   4   8   1    9   2   3   5   4   6   7
4   7    6   1   5   8   9   2   3      4   9    8   1   7   2   3   5   6   5   8    2   3   1   7   6   9   4
5   3    9   6   7   2   8   1   4      1   6    2   3   5   8   7   4   9   6   4    1   5   9   8   7   2   3
1   2    8   9   3   4   7   6   5      7   5    3   6   9   4   1   2   8   7   9    3   4   6   2   8   1   5




        Sudoku Puzzle 13                        Sudoku Puzzle 14                     Sudoku Puzzle 15
7   8    5   2   1   4   3   9   6      8   2    5   3   9   4   1   7   6   7   5    2   8   6   4   9   1   3
2   3    6   9   7   8   5   1   4      4   6    7   1   5   8   3   9   2   1   8    4   9   3   5   6   2   7
9   4    1   3   6   5   2   8   7      3   1    9   6   2   7   8   4   5   6   3    9   1   2   7   5   8   4
4   9    3   6   5   2   8   7   1      2   5    3   8   7   9   4   6   1   3   4    8   7   1   6   2   5   9
8   6    7   1   3   9   4   5   2      9   8    1   4   6   3   2   5   7   2   1    5   4   9   8   3   7   6
5   1    2   4   8   7   9   6   3      7   4    6   2   1   5   9   8   3   9   7    6   3   5   2   8   4   1
6   7    9   8   2   3   1   4   5      1   9    2   7   4   6   5   3   8   5   9    3   2   7   1   4   6   8
3   5    8   7   4   1   6   2   9      5   7    8   9   3   2   6   1   4   4   2    1   6   8   3   7   9   5
1   2    4   5   9   6   7   3   8      6   3    4   5   8   1   7   2   9   8   6    7   5   4   9   1   3   2




        Sudoku Puzzle 16                        Sudoku Puzzle 17                     Sudoku Puzzle 18
8   4    9   2   1   5   3   6   7      7   5    2   9   6   3   8   1   4   8   6    5   2   1   7   3   9   4
2   5    6   7   8   3   1   9   4      6   9    4   5   1   8   7   2   3   2   9    7   3   8   4   6   1   5
3   1    7   4   6   9   2   5   8      3   8    1   7   2   4   9   5   6   3   1    4   6   5   9   2   7   8
7   8    4   6   2   1   9   3   5      9   1    7   3   4   2   6   8   5   6   5    2   7   9   8   4   3   1
5   9    2   8   3   7   4   1   6      5   6    3   8   7   1   4   9   2   7   8    3   1   4   2   9   5   6
6   3    1   5   9   4   8   7   2      2   4    8   6   9   5   3   7   1   1   4    9   5   3   6   7   8   2
9   2    8   1   5   6   7   4   3      4   3    5   1   8   9   2   6   7   5   7    8   4   6   3   1   2   9
1   7    5   3   4   2   6   8   9      8   2    6   4   5   7   1   3   9   4   3    1   9   2   5   8   6   7
4   6    3   9   7   8   5   2   1      1   7    9   2   3   6   5   4   8   9   2    6   8   7   1   5   4   3
Challenging Sudoku Puzzles - Book 2
             From www.veryfreesudoku.com


 Sudoku Puzzle 1       5          1
                                   7 1 8   4
                                   6
                         8             5
                           7     2     9
                       4 5   1       2
                               1   3
                         1   7   4   8
                         3   8

     9 4                 2            Sudoku Puzzle 2
  1
7 5   6 8
  7 1       5                 6
    3                         8
      5 4
4 6                           5
      8   5
      7 3
Challenging Sudoku Puzzles - Book 2
                 From www.veryfreesudoku.com


    Sudoku Puzzle 3             4           7
                              8 5
                            9   7     8 4 3
                                8 9   4   6
                                  8 5
                                        2 7
                            4           1 9
                            2       1       3
                                      9

         6                        2       Sudoku Puzzle 4
5                  8
     8                  3         9
1       5               9         7
  4     9 7                       5
          1
3       6 2
      5 1   8                     3
    1       7
Challenging Sudoku Puzzles - Book 2
                    From www.veryfreesudoku.com


    Sudoku Puzzle 5            6                      8 3
                                         9              5
                                                  3               1
                               7 1                2               9
                                         6 1              8
                               3 4                9
                                                      1
                               2   3                  4       5
                               1 5                    9

8                     3                      Sudoku Puzzle 6
            2
6       7             9 8 3
            5         6   4
                        6 8
3       8                            7
1               4
5       4                  1         2
        3                       7
Challenging Sudoku Puzzles - Book 2
             From www.veryfreesudoku.com


 Sudoku Puzzle 7        3             4        2 9
                                    7                6 5
                                    6 8                3
                                    1                3 6
                                           9
                        5           4 1        3
                        7                                4
                            4         6 1
                                    3 2              9

                                      Sudoku Puzzle 8
                    2           8
      8 2 7                     3
      6                         7
  8 7 4     9
4 6   5       2
  3     5   1
1             4
5       4 8
Challenging Sudoku Puzzles - Book 2
                  From www.veryfreesudoku.com


    Sudoku Puzzle 9                  3
                                     8   7          4
                                     1 3 6          9 7
                            8                     7   6
                            9                   2 8   1
                                     5
                                                    2 8
                            6             4
                            1             5     3

     9      3  7 8 5                      Sudoku Puzzle 10
             2     1
         7       2
         4         6
2          6   8 5   3
                     9
             8   9
  6
7 5         1 3
Challenging Sudoku Puzzles - Book 2
              From www.veryfreesudoku.com


 Sudoku Puzzle 11                     6         8       3
                        7 6
                        5                   7               4
                               1                        4
                               9              2
                             5 6              4             2
                                            3 1 7
                        8        5 7
                                            2       1       9

  8                       2           Sudoku Puzzle 12
            5 6           1 7
    3                       6
4   1   6                   9
    8 7
3 6   4 9
        1 2 9
    4 6   7
6 5
Challenging Sudoku Puzzles - Book 2
              From www.veryfreesudoku.com


 Sudoku Puzzle 13                           1         2
                        8                   5 9       4
                             9        6
                                                  7
                               4
                             7 1                  5 3
                                      9 2           6
                             3                      1 2
                             8        7

                          3 1         Sudoku Puzzle 14
    7 1                   2
  9 3           4           8
6 1                         5
9               8         4
           6
           9 5
  7      4 8   2
             1 5                 3
Challenging Sudoku Puzzles - Book 2
               From www.veryfreesudoku.com


 Sudoku Puzzle 15         7
                          2            6                   5
                          4                            3
                               2             8
                          8            1         5
                                       2         9 6     7
                                                   9     6
                               9       3               7 2
                               1             7 4         3

  3 9 7                                Sudoku Puzzle 16
  7   5          8
  1                                2
                           5
7        4       2 1
4 8        5
         9 3          2
           7                       8
           6          3            9
Challenging Sudoku Puzzles - Book 2
                   From www.veryfreesudoku.com


    Sudoku Puzzle 17                      1   7         6 2 3
                                          9 6               7
                              7
                                          4             5
                              6               3 8
                                  9                             1
                                  7           2     5       3
                                          6       3   7
                                                  4 7           9

     5 9 4                7           8       Sudoku Puzzle 18
2              8
            4 9
8         9 6
    4 8       1 5
    3           4
      5 2 8
  8 6 1 7     5
Challenging Sudoku Puzzles - Book 2
                                     From www.veryfreesudoku.com


        Sudoku Puzzle 1                         Sudoku Puzzle 2                      Sudoku Puzzle 3
5   4    1   6   7   8   2   9   3      6   3    9   4   5   1   8   2   7   6   2   4   1   9   3   8   5   7
6   2    3   9   4   5   7   1   8      2   1    8   3   9   7   6   5   4   3   8   5   7   4   2   9   1   6
7   9    8   3   2   1   6   5   4      7   5    4   6   8   2   1   3   9   9   1   7   5   6   8   4   3   2
3   8    2   4   9   7   1   6   5      8   7    1   9   2   3   5   4   6   7   3   8   9   2   4   5   6   1
1   6    7   5   8   2   4   3   9      5   4    3   1   7   6   2   9   8   1   6   2   8   5   7   3   4   9
4   5    9   1   6   3   8   2   7      9   2    6   5   4   8   7   1   3   5   4   9   6   3   1   2   7   8
8   7    5   2   1   9   3   4   6      4   6    7   2   1   9   3   8   5   4   7   3   2   8   6   1   9   5
9   1    6   7   3   4   5   8   2      3   9    2   8   6   5   4   7   1   2   9   6   4   1   5   7   8   3
2   3    4   8   5   6   9   7   1      1   8    5   7   3   4   9   6   2   8   5   1   3   7   9   6   2   4




        Sudoku Puzzle 4                         Sudoku Puzzle 5                      Sudoku Puzzle 6
7   1    6   9   3   5   4   8   2      6   7    1   5   4   8   3   9   2   8   4   5   1   7   3   9   2   6
5   3    9   4   2   8   6   7   1      4   3    9   6   1   2   5   7   8   9   3   1   2   6   8   7   5   4
2   8    4   1   7   6   3   5   9      5   8    2   9   3   7   4   6   1   6   2   7   4   5   9   8   3   1
1   6    2   8   5   3   9   4   7      7   1    8   4   2   5   6   3   9   7   1   9   5   8   6   2   4   3
8   4    3   2   9   7   1   6   5      9   2    6   1   7   3   8   4   5   4   5   2   7   3   1   6   8   9
9   7    5   6   4   1   2   3   8      3   4    5   8   9   6   2   1   7   3   6   8   9   2   4   5   1   7
3   9    8   7   6   2   5   1   4      8   6    7   3   5   1   9   2   4   1   7   6   8   4   2   3   9   5
6   2    7   5   1   4   8   9   3      2   9    3   7   8   4   1   5   6   5   8   4   3   9   7   1   6   2
4   5    1   3   8   9   7   2   6      1   5    4   2   6   9   7   8   3   2   9   3   6   1   5   4   7   8




        Sudoku Puzzle 7                         Sudoku Puzzle 8                      Sudoku Puzzle 9
3   8    5   4   6   2   9   1   7      8   1    2   3   6   5   7   9   4   7   9   3   2   5   4   1   6   8
4   2    7   9   3   1   8   6   5      3   7    5   9   1   4   2   6   8   5   6   8   1   7   9   3   4   2
1   9    6   8   5   7   4   2   3      6   4    9   8   2   7   5   1   3   4   2   1   3   6   8   5   9   7
9   7    1   5   4   8   2   3   6      9   5    1   6   8   2   4   3   7   8   1   4   9   3   5   7   2   6
2   3    8   7   9   6   5   4   1      2   8    7   4   3   1   9   5   6   9   3   6   7   4   2   8   5   1
5   6    4   1   2   3   7   8   9      4   6    3   5   7   9   8   2   1   2   7   5   8   1   6   4   3   9
7   1    2   3   8   9   6   5   4      7   3    4   2   5   6   1   8   9   3   4   7   6   9   1   2   8   5
8   4    9   6   1   5   3   7   2      1   2    8   7   9   3   6   4   5   6   5   2   4   8   7   9   1   3
6   5    3   2   7   4   1   9   8      5   9    6   1   4   8   3   7   2   1   8   9   5   2   3   6   7   4
Challenging Sudoku Puzzles - Book 2
                                     From www.veryfreesudoku.com


        Sudoku Puzzle 10                        Sudoku Puzzle 11                     Sudoku Puzzle 12
1   9    2   3   6   7   8   5   4      1   9    4   6   5   8   2   3   7   5   8    6   1   7   9   4   2   3
6   8    5   9   2   4   3   1   7      7   6    3   2   4   9   5   1   8   2   4    9   3   5   6   8   1   7
3   4    7   8   1   5   2   9   6      5   2    8   1   7   3   6   9   4   7   1    3   8   2   4   5   9   6
5   7    4   2   9   3   1   6   8      2   8    1   3   6   7   9   4   5   4   7    1   2   6   8   3   5   9
2   1    9   6   4   8   5   7   3      4   7    9   5   8   2   3   6   1   9   2    8   7   3   5   6   4   1
8   3    6   5   7   1   4   2   9      3   5    6   9   1   4   8   7   2   3   6    5   4   9   1   7   8   2
4   2    1   7   8   6   9   3   5      9   4    2   8   3   1   7   5   6   8   3    7   5   1   2   9   6   4
9   6    3   4   5   2   7   8   1      8   1    5   7   9   6   4   2   3   1   9    4   6   8   7   2   3   5
7   5    8   1   3   9   6   4   2      6   3    7   4   2   5   1   8   9   6   5    2   9   4   3   1   7   8




        Sudoku Puzzle 13                        Sudoku Puzzle 14                     Sudoku Puzzle 15
5   6    3   4   1   7   9   2   8      4   2    6   8   5   7   9   3   1   7   5    1   4   9   3   2   6   8
8   1    7   2   5   9   6   4   3      5   8    7   1   3   9   4   2   6   2   3    8   6   1   7   4   9   5
4   9    2   6   8   3   1   7   5      1   9    3   6   2   4   7   5   8   4   6    9   8   5   2   7   3   1
3   2    8   1   4   5   7   9   6      6   1    8   7   4   2   3   9   5   9   2    3   7   8   6   5   1   4
9   5    4   3   7   6   2   8   1      9   3    2   5   1   8   6   4   7   8   7    6   1   4   5   3   2   9
6   7    1   8   9   2   5   3   4      7   5    4   9   6   3   1   8   2   1   4    5   2   3   9   6   8   7
1   4    5   9   2   8   3   6   7      2   6    1   3   9   5   8   7   4   3   8    7   5   2   1   9   4   6
7   3    9   5   6   4   8   1   2      3   7    5   4   8   6   2   1   9   5   9    4   3   6   8   1   7   2
2   8    6   7   3   1   4   5   9      8   4    9   2   7   1   5   6   3   6   1    2   9   7   4   8   5   3




        Sudoku Puzzle 16                        Sudoku Puzzle 17                     Sudoku Puzzle 18
8   3    9   7   2   6   4   1   5      5   4    1   9   7   8   6   2   3   3   5    9   4   6   1   7   2   8
2   7    4   5   1   8   6   9   3      3   8    9   6   5   2   4   1   7   2   4    1   9   8   7   5   6   3
5   1    6   3   4   9   7   8   2      7   6    2   4   1   3   8   9   5   6   7    8   3   5   2   4   9   1
3   6    2   1   9   7   8   5   4      2   3    4   7   9   1   5   8   6   8   1    5   7   4   9   6   3   2
7   9    5   4   8   2   1   3   6      6   1    5   3   8   4   9   7   2   7   2    4   8   3   6   9   1   5
4   8    1   6   5   3   9   2   7      8   9    7   5   2   6   3   4   1   9   6    3   2   1   5   8   7   4
6   5    8   9   3   4   2   7   1      9   7    8   2   6   5   1   3   4   1   9    7   5   2   8   3   4   6
9   4    3   2   7   1   5   6   8      4   2    6   1   3   9   7   5   8   4   8    6   1   7   3   2   5   9
1   2    7   8   6   5   3   4   9      1   5    3   8   4   7   2   6   9   5   3    2   6   9   4   1   8   7
Challenging Sudoku Puzzles - Book 3
               From www.veryfreesudoku.com


 Sudoku Puzzle 1                                 9       5 7
                              1 4            5             2

                                                         2 5
                                    3            1 6
                          9 5                7           3
                                             1               8
                                    2 7              3
                          3                  2 8

8 7                   4         3       Sudoku Puzzle 2
4          2                    1
3   5          9
    9        4 5
             2   1
           7 5   4
                                8
     7 1 6
                 7 3
Challenging Sudoku Puzzles - Book 3
                     From www.veryfreesudoku.com


    Sudoku Puzzle 3            9             6     8 7
                                     3               1
                                         4 7             9 3
                               1               5
                                     2       3 9            5
                                             8     2        6
                               3             2              9
                               6 5             7
                                             5   3

6 8                    9 2                    Sudoku Puzzle 4

             8                   9
         8       3
     2                     1
4   5 9                  3 2
    1 5                8   6
5     2                  9   7
  6   4
Challenging Sudoku Puzzles - Book 3
                    From www.veryfreesudoku.com


    Sudoku Puzzle 5           9                                   5
                                       2
                                         4 5                      2
                                       6 8                7       1
                                1                     9
                              2 9           3
                                       5          7       3
                                            6                 7
                              8 2                             1

     7          2 8 5                        Sudoku Puzzle 6
1                   2
     3        1   6
4             2 6 5
            7   9     6
3
     1          8
6           1                     7
8                               4 2
Challenging Sudoku Puzzles - Book 3
                    From www.veryfreesudoku.com


    Sudoku Puzzle 7                1                7         3
                                   3                          9
                               7           2              8

                                           6 2        1
                                                  9 4 7 2
                                   5                6
                                   2              8 1
                               9                  4       5

     4 5                                       Sudoku Puzzle 8
9           8         1
7                            1 9
                           3   5

     8 2        6                      7
            2              5
        9             7
5               4          6
Challenging Sudoku Puzzles - Book 3
                  From www.veryfreesudoku.com


    Sudoku Puzzle 9               6                   3
                                  5 3        7
                             1             2 4 5
                             5                 3 8
                             9           2 6       1
                                                 5
                             3                   7 4
                             7         4 1
                                       1

                              9           Sudoku Puzzle 10
           2 4
4      5                 6         1
     3 9 6
         8               5
              9 7          8
     2                   3 5
     7 8
5             1                    4
Challenging Sudoku Puzzles - Book 3
                     From www.veryfreesudoku.com


    Sudoku Puzzle 11                                             9
                                                   8       3 6
                               3                       7
                               5 2           4             1
                                 6                 3       2 8
                                 1           6             7   4
                               7                           9
                               4             5             8
                                                   1

3        7       5                           Sudoku Puzzle 12
     9
             4       9 8 2
                       2
                 1 9     7
5                4
         3         8   4
2
     6 4                    8 9
Challenging Sudoku Puzzles - Book 3
                  From www.veryfreesudoku.com


    Sudoku Puzzle 13              2           7 5
                                          9 8 6   3 7

                                  4                       2
                             2            5       3
                             6                7   4 9
                                          8   5   1
                                                9   3
                                            2   1     7

     3      4            8                    Sudoku Puzzle 14
2           9 6          5
                    5                 1
     9                   3            8
3        6 1                          4
         1
6                   9         4
     5                   1
            8                 5 9
Challenging Sudoku Puzzles - Book 3
                 From www.veryfreesudoku.com


    Sudoku Puzzle 15        2 1           6         8 5
                                      6         9
                                                8     3
                            1       8                 6
                            7   9                     1
                            8 3   9   6
                                  2     3                 7
                            5   7
                                                          4

         8 1 4                    5       Sudoku Puzzle 16
5        7   3                    4
           6                 8
     7
            4        2   1
                   5 3 6
                         6
     1 5 8
     3 4                9
Challenging Sudoku Puzzles - Book 3
                From www.veryfreesudoku.com


Sudoku Puzzle 17          1                       2
                          8                           1 5
                                                        9
                          7                       6   8
                                              7
                          2 6         4 7
                            9 8   1   3
                          3 2       9
                              4 5   7

    7       2               4           Sudoku Puzzle 18
 9          3
 8 3                   7 2
 6          5 9

 2 4                        7 6
        5     3 2
        7       6
            8 4                  1
Challenging Sudoku Puzzles - Book 3
                                     From www.veryfreesudoku.com


        Sudoku Puzzle 1                         Sudoku Puzzle 2                      Sudoku Puzzle 3
2   3    8   1   6   9   4   5   7      8   7    1   5   9   6   4   2   3   9   1   2   6   3   8   7   5   4
6   1    4   3   5   7   9   8   2      4   9    6   3   2   8   7   5   1   7   3   6   9   4   5   1   2   8
5   7    9   8   4   2   1   6   3      3   2    5   7   4   1   9   8   6   5   8   4   7   2   1   6   9   3
8   4    1   9   3   6   7   2   5      2   6    9   8   1   4   5   3   7   1   6   3   4   5   2   9   8   7
7   2    3   5   8   1   6   9   4      7   5    4   6   3   2   8   1   9   8   2   7   3   9   6   4   1   5
9   5    6   2   7   4   8   3   1      1   3    8   9   7   5   6   4   2   4   9   5   8   1   7   2   3   6
4   9    5   6   1   3   2   7   8      6   4    3   2   5   9   1   7   8   3   7   1   2   8   4   5   6   9
1   8    2   7   9   5   3   4   6      5   8    7   1   6   3   2   9   4   6   5   8   1   7   9   3   4   2
3   6    7   4   2   8   5   1   9      9   1    2   4   8   7   3   6   5   2   4   9   5   6   3   8   7   1




        Sudoku Puzzle 4                         Sudoku Puzzle 5                      Sudoku Puzzle 6
6   8    4   3   5   9   2   7   1      9   8    3   7   2   6   1   4   5   9   7   6   4   3   2   8   5   1
7   5    9   1   2   4   6   3   8      5   4    2   1   9   3   8   6   7   1   4   5   9   6   8   7   2   3
1   3    2   8   6   7   5   9   4      6   7    1   4   5   8   9   3   2   2   3   8   5   1   7   6   9   4
9   1    8   6   3   2   7   4   5      3   5    6   8   4   2   7   9   1   4   9   7   3   2   6   5   1   8
3   2    6   7   4   5   8   1   9      7   1    8   5   6   9   4   2   3   5   8   1   7   4   9   2   3   6
4   7    5   9   8   1   3   2   6      2   9    4   3   1   7   6   5   8   3   6   2   8   5   1   4   7   9
2   9    1   5   7   8   4   6   3      4   6    5   2   7   1   3   8   9   7   1   3   2   8   4   9   6   5
5   4    3   2   1   6   9   8   7      1   3    9   6   8   5   2   7   4   6   2   4   1   9   5   3   8   7
8   6    7   4   9   3   1   5   2      8   2    7   9   3   4   5   1   6   8   5   9   6   7   3   1   4   2




        Sudoku Puzzle 7                         Sudoku Puzzle 8                      Sudoku Puzzle 9
8   1    9   6   2   7   4   5   3      1   4    5   3   2   9   7   8   6   8   6   2   5   1   9   4   3   7
6   3    5   4   1   8   2   7   9      9   2    6   8   7   1   4   5   3   4   5   3   6   8   7   2   1   9
7   4    2   3   5   9   6   8   1      7   3    8   6   5   4   2   1   9   1   7   9   3   2   4   5   6   8
2   7    1   8   6   3   5   9   4      4   9    1   7   8   2   3   6   5   5   4   6   9   7   1   3   8   2
4   9    6   2   7   5   1   3   8      6   5    7   4   9   3   1   2   8   9   3   8   2   6   5   7   4   1
5   8    3   1   9   4   7   2   6      3   8    2   1   6   5   9   4   7   2   1   7   4   3   8   9   5   6
1   5    7   9   3   6   8   4   2      8   7    4   2   3   6   5   9   1   3   2   5   8   9   6   1   7   4
3   2    4   5   8   1   9   6   7      2   6    9   5   1   7   8   3   4   7   8   4   1   5   2   6   9   3
9   6    8   7   4   2   3   1   5      5   1    3   9   4   8   6   7   2   6   9   1   7   4   3   8   2   5
Challenging Sudoku Puzzles - Book 3
                                     From www.veryfreesudoku.com


        Sudoku Puzzle 10                        Sudoku Puzzle 11                     Sudoku Puzzle 12
2   6    3   1   8   5   4   9   7      6   8    2   1   5   3   4   7   9   3   8    7   9   5   2   1   6   4
9   1    7   2   4   6   8   3   5      1   7    5   9   8   4   3   6   2   4   9    2   6   8   1   5   7   3
4   8    5   9   7   3   6   2   1      3   4    9   2   6   7   5   1   8   6   1    5   4   7   3   9   8   2
8   3    9   6   5   1   7   4   2      5   2    7   4   9   8   1   3   6   7   4    1   8   3   5   6   2   9
7   4    1   8   3   2   5   6   9      9   6    4   7   3   1   2   8   5   8   3    6   2   1   9   4   5   7
6   5    2   4   9   7   1   8   3      8   1    3   6   2   5   7   9   4   5   2    9   7   4   6   3   1   8
1   2    4   7   6   9   3   5   8      7   3    6   8   4   2   9   5   1   9   7    3   5   6   8   2   4   1
3   7    8   5   2   4   9   1   6      4   9    1   5   7   6   8   2   3   2   5    8   1   9   4   7   3   6
5   9    6   3   1   8   2   7   4      2   5    8   3   1   9   6   4   7   1   6    4   3   2   7   8   9   5




        Sudoku Puzzle 13                        Sudoku Puzzle 14                     Sudoku Puzzle 15
3   2    4   1   7   5   6   8   9      1   3    5   4   2   7   8   9   6   2   1    3   6   7   4   8   5   9
1   5    9   8   6   2   3   7   4      2   8    4   9   6   1   5   3   7   4   8    6   5   3   9   1   7   2
8   7    6   4   9   3   2   5   1      7   6    9   3   8   5   4   2   1   9   7    5   1   2   8   4   3   6
9   4    7   5   1   6   8   2   3      5   9    7   2   4   6   3   1   8   1   5    4   7   8   2   9   6   3
2   8    5   9   3   4   7   1   6      3   2    6   1   5   8   9   7   4   7   6    9   3   4   5   2   1   8
6   3    1   7   2   8   4   9   5      8   4    1   7   9   3   2   6   5   8   3    2   9   1   6   7   4   5
4   9    8   3   5   7   1   6   2      6   1    8   5   3   9   7   4   2   6   4    8   2   5   1   3   9   7
7   1    2   6   4   9   5   3   8      9   5    2   6   7   4   1   8   3   5   2    7   4   9   3   6   8   1
5   6    3   2   8   1   9   4   7      4   7    3   8   1   2   6   5   9   3   9    1   8   6   7   5   2   4




        Sudoku Puzzle 16                        Sudoku Puzzle 17                     Sudoku Puzzle 18
3   9    8   1   4   7   6   2   5      1   3    9   7   5   2   6   4   8   1   5    7   9   2   6   8   4   3
5   6    7   2   3   8   1   9   4      8   7    6   9   4   3   2   1   5   4   9    2   8   3   7   1   6   5
1   4    2   6   5   9   7   8   3      4   5    2   1   6   8   7   3   9   6   8    3   1   4   5   7   2   9
2   7    3   9   6   1   5   4   8      7   4    5   3   2   6   9   8   1   7   6    8   4   5   9   3   1   2
9   5    6   4   8   3   2   7   1      9   8    3   4   7   1   5   2   6   3   1    9   6   7   2   4   5   8
4   8    1   7   2   5   3   6   9      2   6    1   8   9   5   4   7   3   5   2    4   3   1   8   9   7   6
7   2    9   3   1   4   8   5   6      5   9    8   2   1   4   3   6   7   8   4    1   5   6   3   2   9   7
6   1    5   8   9   2   4   3   7      3   2    7   6   8   9   1   5   4   2   3    5   7   9   1   6   8   4
8   3    4   5   7   6   9   1   2      6   1    4   5   3   7   8   9   2   9   7    6   2   8   4   5   3   1
Challenging Sudoku Puzzles - Book 4
              From www.veryfreesudoku.com


 Sudoku Puzzle 1             9              3 8       5
                        1             2           8
                                                      4
                                 1            2   5
                          8                   7 2
                        7 5                   9   1
                                      8           9 3
                                                  4
                             6 3 5

8 1     9 7 2                          Sudoku Puzzle 2
    9       3 7
          1   6
  4         8 2
7             4
1 8     6
2     5   3   9
    7     9
        7
Challenging Sudoku Puzzles - Book 4
                    From www.veryfreesudoku.com


    Sudoku Puzzle 3                      2 4
                              1          6 5            9
                                           1            6 7
                                           6          7   9
                              4                   5
                                         3                1     6
                              5              7        6
                                                  2           3 5
                                         4                8

            8         9              3       Sudoku Puzzle 4
                1          8
                5          7 4 9
6           5
                4 3             9 5
7
     9                               2
              7 4
     4      2   8               6
Challenging Sudoku Puzzles - Book 4
             From www.veryfreesudoku.com


 Sudoku Puzzle 5                                   3
                           2 5 1 8
                       4 1   9
                         5   4     2                   7
                           7     1
                           8 2     9
                       6 9
                                                   5
                                           7 4 3       1

  4 7                    3            Sudoku Puzzle 6
        5
  8 5   1 2
  1   6
7 9                           8
    4   2   6
                  5
        9 3     8 1
            7 3 9
Challenging Sudoku Puzzles - Book 4
                    From www.veryfreesudoku.com


    Sudoku Puzzle 7                               1       3 2
                              7 4 9 3
                                    6                     9
                                6   5                 3       4
                              8 1 4

                              9                               1
                                              5           8
                              3 7           2 9

            1                                Sudoku Puzzle 8
        6                            1
7 8           4   3 5
1   3         6 9
                  5   2
9           2 7 4   1
        2
                      3 4
                9               3 7
Challenging Sudoku Puzzles - Book 4
                   From www.veryfreesudoku.com


    Sudoku Puzzle 9          8 7                     6           3
                               5                     9
                               6 1               7           4
                                                 9               1
                                            7            5       8
                                                             6
                                                 3           7 4
                                                 5       8
                             9          4                        6

8 5            6                            Sudoku Puzzle 10
         7 5
                                    8
     4 8          3
7                 1   4
     1        8   2 5
              3     9 5
            4   2 7 1
3               7 4
Challenging Sudoku Puzzles - Book 4
                 From www.veryfreesudoku.com


    Sudoku Puzzle 11        7         6
                            9             3 4   8   6
                                          9     1
                                            2 6 9 3
                            8 5 3
                                          8
                            3 8                    6
                                      7        8
                            6                  1   2

     9      5           3         2       Sudoku Puzzle 12
                   3
3        9                   6
       8 6                   1
         4 9
         8           2
     2     6         5
1                    4
8                  5 1 9 3
Challenging Sudoku Puzzles - Book 4
                From www.veryfreesudoku.com


 Sudoku Puzzle 13               2     7
                                5 7 6 3                       4
                          4
                                                  4       1
                                4           8             5
                                        6             9
                                                      3       9
                          8                     9
                                                6 7 2

            1 4             3 9             Sudoku Puzzle 14
      7
          7 3 5               1
  7       3 5               4 2
  6         7
      4
5 4               9         7
6   1                               3
            4               2
Challenging Sudoku Puzzles - Book 4
                 From www.veryfreesudoku.com


    Sudoku Puzzle 15                             6       9       3
                            3                    8           4
                            5 9              3                   8
                                               1
                                 8           7 3             9 4
                            9            1
                                 5                   8
                                                         4 6
                                 7 2                 6

9                                            Sudoku Puzzle 16
  4 3
6 5                4         8 9
                        2
     9   8                   1
     7 8                             3
     1 9   8                 6
         6                  5
     6     3            1 7 2
Challenging Sudoku Puzzles - Book 4
                    From www.veryfreesudoku.com


    Sudoku Puzzle 17                2           8 6          3
                                                  4
                                            7                    1
                                            1 2              6
                              7                     9 5
                                            3         1 9
                              9
                              8 1               5            4
                                            4            7

4           7                   5               Sudoku Puzzle 18

     3          5               6 2
     5                8
1           6 2
     2        9   1                     8
            4   9 8
                  6                     7
     8 9                        4
Challenging Sudoku Puzzles - Book 4
                                     From www.veryfreesudoku.com


        Sudoku Puzzle 1                         Sudoku Puzzle 2                      Sudoku Puzzle 3
4   9    6   7   3   8   1   2   5      8   1    6   3   9   7   2   5   4   9   7   2   4   6   8   3   5   1
1   7    5   2   4   6   3   8   9      5   2    9   6   4   8   3   7   1   1   8   6   5   7   3   9   4   2
3   2    8   9   1   5   7   6   4      3   7    4   2   5   1   9   6   8   3   4   5   1   9   2   6   7   8
6   3    1   4   8   2   9   5   7      6   4    3   7   1   5   8   2   9   8   2   1   6   3   7   5   9   4
9   8    4   1   5   7   2   3   6      7   9    5   8   3   2   1   4   6   4   6   9   2   5   1   7   8   3
7   5    2   3   6   9   4   1   8      1   8    2   9   6   4   7   3   5   7   5   3   9   8   4   1   2   6
5   4    7   8   2   1   6   9   3      2   6    1   5   8   3   4   9   7   5   3   8   7   4   6   2   1   9
8   1    9   6   7   3   5   4   2      4   5    7   1   2   9   6   8   3   6   1   7   8   2   9   4   3   5
2   6    3   5   9   4   8   7   1      9   3    8   4   7   6   5   1   2   2   9   4   3   1   5   8   6   7




        Sudoku Puzzle 4                         Sudoku Puzzle 5                      Sudoku Puzzle 6
4   7    5   8   6   9   1   2   3      5   8    9   7   4   6   1   3   2   1   4   7   8   9   6   5   3   2
9   2    3   4   1   7   8   5   6      7   3    2   5   1   8   4   6   9   6   2   9   5   4   3   8   1   7
1   8    6   3   5   2   7   4   9      4   1    6   9   3   2   8   7   5   3   8   5   7   1   2   9   4   6
6   3    9   5   8   1   2   7   4      9   5    1   4   6   3   2   8   7   2   1   8   6   7   9   4   5   3
2   1    8   7   4   3   6   9   5      2   6    7   8   9   1   5   4   3   7   9   6   3   5   4   1   2   8
7   5    4   9   2   6   3   8   1      3   4    8   2   5   7   9   1   6   5   3   4   1   2   8   6   7   9
8   9    7   6   3   5   4   1   2      6   9    3   1   8   5   7   2   4   9   7   3   4   8   1   2   6   5
5   6    2   1   7   4   9   3   8      1   7    4   3   2   9   6   5   8   4   6   2   9   3   5   7   8   1
3   4    1   2   9   8   5   6   7      8   2    5   6   7   4   3   9   1   8   5   1   2   6   7   3   9   4




        Sudoku Puzzle 7                         Sudoku Puzzle 8                      Sudoku Puzzle 9
6   8    5   4   1   9   3   2   7      5   9    4   1   3   6   7   2   8   8   7   9   5   4   6   1   2   3
7   4    9   3   2   8   5   6   1      2   3    6   8   5   7   9   4   1   4   5   2   3   1   9   6   8   7
1   3    2   6   7   5   9   8   4      7   8    1   9   4   2   3   5   6   3   6   1   2   7   8   9   4   5
2   6    7   5   8   3   1   4   9      1   2    3   5   6   9   8   7   4   6   2   8   4   9   5   7   3   1
8   1    4   9   6   7   2   3   5      4   6    7   3   1   8   5   9   2   1   4   3   7   6   2   5   9   8
5   9    3   1   4   2   6   7   8      9   5    8   2   7   4   6   1   3   7   9   5   1   8   3   4   6   2
9   5    6   8   3   4   7   1   2      3   7    2   4   8   5   1   6   9   5   8   6   9   3   1   2   7   4
4   2    1   7   5   6   8   9   3      6   1    9   7   2   3   4   8   5   2   3   7   6   5   4   8   1   9
3   7    8   2   9   1   4   5   6      8   4    5   6   9   1   2   3   7   9   1   4   8   2   7   3   5   6
Challenging Sudoku Puzzles - Book 4
                                     From www.veryfreesudoku.com


        Sudoku Puzzle 10                        Sudoku Puzzle 11                     Sudoku Puzzle 12
8   5    4   1   6   3   9   7   2      7   4    6   1   5   8   3   2   9   7   9    1   5   8   6   3   4   2
9   2    7   5   4   8   6   3   1      9   1    2   3   4   7   8   5   6   6   4    2   7   1   3   8   5   9
1   6    3   2   7   9   5   4   8      5   3    8   9   6   2   1   7   4   3   8    5   9   2   4   7   6   1
2   4    8   7   1   5   3   6   9      4   7    1   5   2   6   9   3   8   2   3    8   6   5   7   9   1   4
7   3    5   9   2   6   1   8   4      8   5    3   7   9   1   4   6   2   5   1    7   4   9   2   6   3   8
6   1    9   3   8   4   2   5   7      2   6    9   8   3   4   7   1   5   9   6    4   8   3   1   2   7   5
4   7    2   6   3   1   8   9   5      3   8    4   2   7   5   6   9   1   4   2    3   1   6   9   5   8   7
5   8    6   4   9   2   7   1   3      1   2    7   6   8   9   5   4   3   1   5    9   3   7   8   4   2   6
3   9    1   8   5   7   4   2   6      6   9    5   4   1   3   2   8   7   8   7    6   2   4   5   1   9   3




        Sudoku Puzzle 13                        Sudoku Puzzle 14                     Sudoku Puzzle 15
3   2    8   4   7   5   1   9   6      8   5    6   2   1   4   7   3   9   1   2    8   5   6   4   9   7   3
9   5    7   6   3   1   8   2   4      3   1    7   9   6   8   2   5   4   3   6    7   9   8   1   5   4   2
4   6    1   2   8   9   5   3   7      4   9    2   7   3   5   6   8   1   5   9    4   3   2   7   6   1   8
7   3    5   9   2   4   6   1   8      1   7    8   3   5   6   9   4   2   7   4    5   8   1   9   2   3   6
2   4    9   8   1   6   7   5   3      9   6    5   4   7   2   3   1   8   2   8    6   7   3   5   1   9   4
1   8    6   7   5   3   9   4   2      2   3    4   8   9   1   5   6   7   9   3    1   6   4   2   8   5   7
6   1    2   5   4   8   3   7   9      5   4    3   1   2   9   8   7   6   6   5    3   4   9   8   7   2   1
8   7    3   1   9   2   4   6   5      6   2    1   5   8   7   4   9   3   8   1    9   2   7   3   4   6   5
5   9    4   3   6   7   2   8   1      7   8    9   6   4   3   1   2   5   4   7    2   1   5   6   3   8   9




        Sudoku Puzzle 16                        Sudoku Puzzle 17                     Sudoku Puzzle 18
9   8    1   2   7   5   4   3   6      1   2    9   8   6   7   4   3   5   4   1    2   7   8   6   3   5   9
7   4    3   9   6   8   5   2   1      6   3    5   1   4   9   2   7   8   9   6    5   2   4   3   7   8   1
6   5    2   3   1   4   7   8   9      4   8    7   3   5   2   6   9   1   8   3    7   9   5   1   4   6   2
1   3    6   4   9   7   2   5   8      5   9    1   2   3   4   8   6   7   7   5    4   3   1   8   9   2   6
4   9    5   8   2   3   6   1   7      7   4    8   6   9   5   1   2   3   1   9    8   6   2   7   5   3   4
2   7    8   1   5   6   9   4   3      2   6    3   7   8   1   9   5   4   3   2    6   5   9   4   1   7   8
5   1    9   7   8   2   3   6   4      9   7    6   4   1   3   5   8   2   2   7    3   4   6   9   8   1   5
3   2    7   6   4   1   8   9   5      8   1    2   5   7   6   3   4   9   5   4    1   8   3   2   6   9   7
8   6    4   5   3   9   1   7   2      3   5    4   9   2   8   7   1   6   6   8    9   1   7   5   2   4   3
Challenging Sudoku Puzzles - Book 5
                    From www.veryfreesudoku.com


    Sudoku Puzzle 1                4                       8     3
                                           9               4
                                           6
                              8 7              9       1
                                                       4         9
                                                   6           1 2
                                9 8 7
                              7     5                            4
                                  2 4                  6

            5              9 7                 Sudoku Puzzle 2
7       9             2                8

        6             4
8               3               9 2
                8               3
1
2       3       6       4
        4             7 5
Challenging Sudoku Puzzles - Book 5
                    From www.veryfreesudoku.com


    Sudoku Puzzle 3            7 9                        8
                                 3                    5       2 1
                                 5                1
                               6                  9 3

                                 4                    8       6
                               8 1                    4           9
                                                      6
                                       3          8       7       4

            9         7         6            Sudoku Puzzle 4
                                3 1
              4 3                 8
3             1
     7      5 3
     4                          9
     2 6        8
4                     2
     9                     7
Challenging Sudoku Puzzles - Book 5
                   From www.veryfreesudoku.com


    Sudoku Puzzle 5                                            7
                                           4             6 3
                                           6     5
                                   6             4             5
                                               6 8
                              1                      2         3
                                               8         1 2
                                           8   6               4
                              9            7 4           8

5 3 4          2                       8       Sudoku Puzzle 6
  8            1                       2
  6                            5
              4 7              3
            8 6   7
     2        3     4
                4   2
     5                                 7
6                         3
Challenging Sudoku Puzzles - Book 5
                  From www.veryfreesudoku.com


    Sudoku Puzzle 7                         4           7
                                            9 7         2
                             6                    2         4
                                  8         1
                                          1 5         8 3
                             5         6
                             2 5     9
                             7         1
                             1   4 7     3

                              4             Sudoku Puzzle 8
            9 4 1
     8 9                 5
                         2 7
3       6 7                           1
              5 8
        3     8                       2
8
            4 7          8            3
Challenging Sudoku Puzzles - Book 5
                     From www.veryfreesudoku.com


    Sudoku Puzzle 9             6                   3         7
                                         9          4         1
                                       8 2              4
                                     4 5                9
                                                        3 5
                                1 6
                                8                       5
                                          3                 6 4
                                              7 5

         6             3                      Sudoku Puzzle 10
3 4                    5              7
7 9                              2
  3              4
             1                   4 3
     6                 2           8
4          5
           6 7                   5
         8   2              9
Challenging Sudoku Puzzles - Book 5
                    From www.veryfreesudoku.com


    Sudoku Puzzle 11                9 4                      7
                                      3 2            5
                                    2                    8
                                       4                 6
                                 8   9 6                 5
                                   7   2                 4
                                   5                 3
                                     8 7             9
                               7     5

                                9           Sudoku Puzzle 12
            1
                      5 2 3 1
  2                   8
4 8                   9     6
            5
        9       4          6
        7             2              4
5       3             6
Challenging Sudoku Puzzles - Book 5
               From www.veryfreesudoku.com


 Sudoku Puzzle 13                     1          6           9
                              2           3          5
                              5           9              8 6
                                          7 4            2
                            1
                          8 9 7 6                    3
                              6
                                4                7
                                             5           1

                      8 3                 Sudoku Puzzle 14
  9           6 1
                4
2 7           8
      5               9 7
          5      2
4 1 6                             9
  5   1 9             4           8
  3
Challenging Sudoku Puzzles - Book 5
                     From www.veryfreesudoku.com


    Sudoku Puzzle 15           7 2       3
                                       9 6 1
                               6       7
                                     7   4   9
                               3 9     2
                               8   7   6     1
                                   6
                                       5       8
                                     3   8 4

         8             4 3                   Sudoku Puzzle 16
     3           2               5 6
                                   1
6                  8 9
1                7 3
         2
             4                        7
         4       5
             6         9 8 3
Challenging Sudoku Puzzles - Book 5
                 From www.veryfreesudoku.com


    Sudoku Puzzle 17       2        4 5 9
                                5 4 3                      8
                                                       2
                                    5          3
                                3                  6           1
                                                     6         9
                                         2         8 3         6
                           8        1
                                         6                 5

6                            2           Sudoku Puzzle 18
                             9 8
  3   5
  1 8
      4 9   1 7
9       5 7 6
  2             4
  5           3
        6 3 7
Challenging Sudoku Puzzles - Book 5
                                     From www.veryfreesudoku.com


        Sudoku Puzzle 1                         Sudoku Puzzle 2                      Sudoku Puzzle 3
1   4    7   2   9   5   8   6   3      4   2    8   5   1   3   9   7   6   7   9   1   3   6   2   8   4   5
2   8    9   6   7   3   4   5   1      7   3    9   6   4   2   1   5   8   4   3   6   8   7   5   9   2   1
3   5    6   1   4   8   2   9   7      6   1    5   8   7   9   2   4   3   2   5   8   4   1   9   3   7   6
8   7    5   9   2   1   3   4   6      3   7    6   2   9   4   8   1   5   6   2   7   5   9   3   4   1   8
6   2    1   3   5   4   7   8   9      8   4    1   7   3   5   6   9   2   1   8   5   6   4   7   2   9   3
9   3    4   8   6   7   5   1   2      5   9    2   1   8   6   7   3   4   3   4   9   1   2   8   5   6   7
4   9    8   7   1   2   6   3   5      1   6    7   4   5   8   3   2   9   8   1   2   7   5   4   6   3   9
7   6    3   5   8   9   1   2   4      2   5    3   9   6   1   4   8   7   5   7   4   9   3   6   1   8   2
5   1    2   4   3   6   9   7   8      9   8    4   3   2   7   5   6   1   9   6   3   2   8   1   7   5   4




        Sudoku Puzzle 4                         Sudoku Puzzle 5                      Sudoku Puzzle 6
1   3    8   9   5   7   2   6   4      8   2    1   3   9   6   5   4   7   5   3   4   9   2   6   1   7   8
7   5    4   8   2   6   9   3   1      5   9    4   7   1   8   6   3   2   9   8   7   3   1   5   4   6   2
2   6    9   1   4   3   5   7   8      3   7    6   2   5   4   9   1   8   2   6   1   4   7   8   9   5   3
3   8    2   6   1   9   4   5   7      7   6    3   1   4   9   2   8   5   8   1   9   5   4   7   2   3   6
9   7    1   5   3   4   8   2   6      4   5    2   6   8   3   7   9   1   3   4   5   8   6   2   7   9   1
6   4    5   2   7   8   1   9   3      1   8    9   5   7   2   4   6   3   7   2   6   1   3   9   8   4   5
5   2    6   7   8   1   3   4   9      6   4    5   8   3   7   1   2   9   1   7   3   6   8   4   5   2   9
4   1    7   3   9   2   6   8   5      2   1    8   9   6   5   3   7   4   4   5   8   2   9   3   6   1   7
8   9    3   4   6   5   7   1   2      9   3    7   4   2   1   8   5   6   6   9   2   7   5   1   3   8   4




        Sudoku Puzzle 7                         Sudoku Puzzle 8                      Sudoku Puzzle 9
8   2    9   4   6   5   1   7   3      1   3    2   8   6   5   9   4   7   6   1   4   5   8   3   2   9   7
4   1    5   9   7   3   6   2   8      5   6    7   9   4   1   3   2   8   5   3   2   9   7   4   6   8   1
6   3    7   8   1   2   5   9   4      4   8    9   3   2   7   5   1   6   9   7   8   2   6   1   4   3   5
3   8    6   1   4   9   2   5   7      9   1    8   6   3   4   2   7   5   3   4   5   6   2   7   9   1   8
9   4    1   5   2   7   8   3   6      3   5    6   7   9   2   4   8   1   2   8   7   4   1   9   3   5   6
5   7    2   3   8   6   4   1   9      2   7    4   1   5   8   6   3   9   1   6   9   8   3   5   7   4   2
2   5    3   6   9   4   7   8   1      7   4    3   5   8   6   1   9   2   8   2   1   3   4   6   5   7   9
7   6    8   2   3   1   9   4   5      8   9    5   2   1   3   7   6   4   7   5   3   1   9   2   8   6   4
1   9    4   7   5   8   3   6   2      6   2    1   4   7   9   8   5   3   4   9   6   7   5   8   1   2   3
Challenging Sudoku Puzzles - Book 5
                                     From www.veryfreesudoku.com


        Sudoku Puzzle 10                        Sudoku Puzzle 11                     Sudoku Puzzle 12
2   8    6   7   1   3   4   9   5      8   9    4   6   5   1   2   3   7   1   5    8   6   2   3   4   9   7
3   4    1   2   9   5   6   8   7      1   7    3   2   8   4   5   9   6   3   7    2   1   9   4   5   6   8
7   9    5   4   6   8   3   2   1      5   2    6   3   9   7   4   8   1   6   9    4   7   8   5   2   3   1
1   3    2   8   4   7   5   6   9      2   5    9   7   4   8   1   6   3   7   2    1   4   6   8   9   5   3
8   7    9   1   5   6   2   4   3      4   8    1   9   6   3   7   5   2   4   8    5   2   3   9   1   7   6
5   6    4   9   3   2   7   1   8      6   3    7   1   2   5   8   4   9   9   3    6   5   7   1   8   4   2
4   2    7   5   8   9   1   3   6      9   6    5   4   1   2   3   7   8   2   1    9   3   4   7   6   8   5
9   1    3   6   7   4   8   5   2      3   4    2   8   7   6   9   1   5   8   6    7   9   5   2   3   1   4
6   5    8   3   2   1   9   7   4      7   1    8   5   3   9   6   2   4   5   4    3   8   1   6   7   2   9




        Sudoku Puzzle 13                        Sudoku Puzzle 14                     Sudoku Puzzle 15
7   8    1   5   2   6   4   3   9      1   2    4   9   5   7   8   3   6   7   2    9   1   8   3   5   6   4
6   2    9   3   8   4   5   7   1      5   9    3   8   6   1   7   2   4   4   5    8   2   9   6   1   7   3
3   5    4   9   7   1   2   8   6      8   6    7   2   3   4   5   9   1   6   1    3   4   7   5   2   8   9
5   6    3   7   4   9   1   2   8      2   7    1   3   8   9   6   4   5   2   6    1   7   3   4   8   9   5
4   1    2   8   3   5   9   6   7      3   8    5   4   1   6   9   7   2   3   9    5   8   2   1   6   4   7
8   9    7   6   1   2   3   4   5      6   4    9   5   7   2   1   8   3   8   4    7   5   6   9   3   1   2
2   4    6   1   9   8   7   5   3      4   1    6   7   2   8   3   5   9   5   8    6   9   4   2   7   3   1
1   3    5   4   6   7   8   9   2      7   5    2   1   9   3   4   6   8   1   3    4   6   5   7   9   2   8
9   7    8   2   5   3   6   1   4      9   3    8   6   4   5   2   1   7   9   7    2   3   1   8   4   5   6




        Sudoku Puzzle 16                        Sudoku Puzzle 17                     Sudoku Puzzle 18
5   1    8   7   6   4   3   9   2      2   7    8   4   5   9   1   6   3   6   9    4   8   3   1   5   2   7
9   3    7   8   2   1   4   5   6      1   5    4   3   6   2   9   8   7   5   7    1   6   4   2   3   9   8
2   4    6   9   3   5   7   8   1      3   9    6   7   8   1   2   4   5   8   3    2   5   7   9   4   1   6
6   7    3   1   4   8   9   2   5      6   1    5   9   3   7   8   2   4   7   1    8   3   2   6   9   4   5
1   5    9   2   7   3   6   4   8      4   3    9   8   2   6   5   7   1   2   6    5   4   9   8   1   7   3
4   8    2   5   9   6   1   7   3      7   8    2   1   4   5   6   3   9   9   4    3   1   5   7   6   8   2
3   9    1   4   8   2   5   6   7      5   4    7   2   9   8   3   1   6   3   2    7   9   1   5   8   6   4
8   6    4   3   5   7   2   1   9      8   6    1   5   7   3   4   9   2   1   5    6   7   8   4   2   3   9
7   2    5   6   1   9   8   3   4      9   2    3   6   1   4   7   5   8   4   8    9   2   6   3   7   5   1
Challenging Sudoku Puzzles - Book 6
                   From www.veryfreesudoku.com


    Sudoku Puzzle 1
                                  1           9           3       4
                                  2                   4
                                                      8 9 1
                             4                3                   6
                                          6           7
                                  9   1               3           5
                                  4 5 7
                             3                    6           8

         5 9                                  Sudoku Puzzle 2
         3           5 2
     1         4            5 7
                          1 2
     2 4 3 7              9
                     4

9           8   6
     6      4 3   8                   1
Challenging Sudoku Puzzles - Book 6
                 From www.veryfreesudoku.com


    Sudoku Puzzle 3              8                         2
                                 1                 7 6
                           9                   6             1
                                                           7 2
                                         2 4                 9
                                         3   1               5
                           1             9
                                 2 8                   3
                                   6               8

     9         4 2           6 3          Sudoku Puzzle 4

  4 6                   1 2
7 1   5
              2 7 4
            8   4                    9
     5      9
9               6 8
8                            3
Challenging Sudoku Puzzles - Book 6
                 From www.veryfreesudoku.com


    Sudoku Puzzle 5                        5    8        3
                                 2         6    3 1
                                                         5
                                         6 9             4
                            5                      9
                            1      7
                                 1 3                 6 9
                                   8               7   1
                                           2         3

     5             9                 6     Sudoku Puzzle 6
     1       7          5
6                  1         4
         8         4                 7
     7       1 2 5 8
                             9
     6       5 8
         5 9 3
7
Challenging Sudoku Puzzles - Book 6
                  From www.veryfreesudoku.com


    Sudoku Puzzle 7               8 2   6
                            8       4 7   5
                                9         2
                            6 2 4     9
                                  1 5
                              5           7
                              3             9
                                6 3 8       2
                            4           3

                 9 8                       Sudoku Puzzle 8
                      8            2
     5       3        1
4        2          7 3            6
     1              3
           2
         3 8            5 7
           7        4 6 1
                    2
Challenging Sudoku Puzzles - Book 6
                From www.veryfreesudoku.com


    Sudoku Puzzle 9                              8 3 5
                                4             7
                                              6
                                    2         4        7
                                8 2 7         5 6
                                3               2
                                              2        8
                          7             8       5      6
                          9                     3

                  5 4                   Sudoku Puzzle 10
4 1
  3 2                       8
6              1 8          9
  7 4          3
                            6 2
1          9
             6 3            5
           4 8              3
Challenging Sudoku Puzzles - Book 6
                 From www.veryfreesudoku.com


    Sudoku Puzzle 11             7                            1
                            5            3          8         2
                                 1              5
                            3            5              1     4
                                         1      9           2 5
                                                8       7
                                 5                            8
                            2                   4           5 9
                                         9                  6

          4                  7 3             Sudoku Puzzle 12
        7 3        8           9
                        8
        9      4 6
5              7                     2
               1   7
4 6                          5

8 1                2 3               4
Challenging Sudoku Puzzles - Book 6
                   From www.veryfreesudoku.com


    Sudoku Puzzle 13
                                           4                 3
                             7             8             1       2
                             5                       6
                                      7                      9 5
                                  3 7 1 8
                                                     8 9
                                  6              7
                                  5 2            6               4

3                    8 9            2      Sudoku Puzzle 14
               1
     7 1 6       9 5                4
               6   7                3

8       5            2
        2 9                         7
                                    1
5                    1
Challenging Sudoku Puzzles - Book 6
                     From www.veryfreesudoku.com


    Sudoku Puzzle 15                 6 5
                                                     4 3
                                     4           5 9 7
                                     1
                                             6          2       4
                                9            2      8       1
                                                                    3
                                     8 3 2              9           6
                                2                       8 7

     9 1         3 8                             Sudoku Puzzle 16
             7              2            3
                       4   1
2 5                        4 8
                       1   5
         8               9 7
7
     3           6
         4 1                     2
Challenging Sudoku Puzzles - Book 6
                From www.veryfreesudoku.com


 Sudoku Puzzle 17            6                              3
                             1                        8 4
                           3 4 7                  1
                                              4         2
                           8             5
                                       6 3 1
                                       4   5 7          1
                               3
                                         6              7 2

            5 1             3 8         Sudoku Puzzle 18
      3
  6                                5
  1                    4
6 3         2
2                           6 9
              3 7
3 8         9 2
  4           7   1
Challenging Sudoku Puzzles - Book 6
                                     From www.veryfreesudoku.com


        Sudoku Puzzle 1                         Sudoku Puzzle 2                      Sudoku Puzzle 3
7   6    4   2   3   1   5   9   8      2   7    5   9   1   3   6   4   8   6   8   5   4   1   3   9   2   7
5   1    8   9   7   6   3   2   4      4   8    3   7   6   5   2   1   9   4   1   2   5   9   7   6   8   3
9   2    3   8   5   4   1   6   7      6   1    9   2   4   8   3   5   7   9   7   3   8   6   2   5   4   1
2   5    7   6   4   8   9   1   3      3   5    7   6   8   9   1   2   4   3   5   1   6   8   9   4   7   2
4   8    9   3   1   2   7   5   6      8   2    4   3   7   1   9   6   5   8   6   7   2   4   5   1   3   9
1   3    6   5   9   7   8   4   2      1   9    6   5   2   4   7   8   3   2   4   9   3   7   1   8   6   5
6   9    2   1   8   3   4   7   5      7   4    8   1   9   2   5   3   6   1   3   4   9   2   6   7   5   8
8   4    5   7   2   9   6   3   1      9   3    1   8   5   6   4   7   2   7   2   8   1   5   4   3   9   6
3   7    1   4   6   5   2   8   9      5   6    2   4   3   7   8   9   1   5   9   6   7   3   8   2   1   4




        Sudoku Puzzle 4                         Sudoku Puzzle 5                      Sudoku Puzzle 6
5   9    8   1   4   2   7   6   3      9   7    1   5   2   8   6   4   3   8   5   2   3   4   9   1   7   6
1   2    7   6   8   3   5   9   4      8   2    5   6   4   3   1   9   7   3   1   4   7   6   2   5   8   9
3   4    6   7   9   5   1   2   8      6   3    4   1   7   9   8   2   5   6   9   7   5   8   1   3   4   2
7   1    4   5   6   9   3   8   2      3   8    6   9   1   2   5   7   4   1   2   8   6   9   3   4   5   7
6   8    9   3   2   7   4   5   1      5   4    2   8   3   7   9   1   6   4   7   9   1   2   5   8   6   3
2   3    5   8   1   4   6   7   9      1   9    7   4   5   6   3   8   2   5   3   6   8   7   4   2   9   1
4   5    3   9   7   8   2   1   6      4   1    3   7   8   5   2   6   9   9   6   1   2   5   8   7   3   4
9   7    1   2   3   6   8   4   5      2   6    8   3   9   4   7   5   1   2   4   5   9   3   7   6   1   8
8   6    2   4   5   1   9   3   7      7   5    9   2   6   1   4   3   8   7   8   3   4   1   6   9   2   5




        Sudoku Puzzle 7                         Sudoku Puzzle 8                      Sudoku Puzzle 9
5   4    1   8   2   3   6   9   7      1   2    7   4   9   8   5   6   3   2   7   6   4   1   9   8   3   5
8   6    2   9   4   7   1   5   3      3   6    4   1   7   5   8   9   2   8   4   3   5   2   7   9   6   1
3   7    9   5   1   6   4   2   8      8   5    9   3   2   6   1   7   4   5   1   9   3   8   6   4   7   2
6   2    4   7   3   9   5   8   1      4   9    2   5   1   7   3   8   6   6   9   5   2   3   4   1   8   7
7   9    8   1   5   4   2   3   6      7   1    8   6   4   3   9   2   5   1   8   2   7   9   5   6   4   3
1   5    3   2   6   8   9   7   4      5   3    6   2   8   9   7   4   1   4   3   7   1   6   8   2   5   9
2   3    5   4   7   1   8   6   9      9   4    3   8   6   1   2   5   7   3   6   4   9   5   2   7   1   8
9   1    6   3   8   5   7   4   2      2   8    5   7   3   4   6   1   9   7   2   1   8   4   3   5   9   6
4   8    7   6   9   2   3   1   5      6   7    1   9   5   2   4   3   8   9   5   8   6   7   1   3   2   4
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging
Challenging

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Challenging

  • 1. http://36dimotiko.blogspot.com Challenging Sudoku Puzzles - Book 1 From www.veryfreesudoku.com Sudoku Puzzle 1 1 6 7 5 4 6 3 1 7 9 4 9 5 3 2 2 6 7 2 4 8 6 9 8 1 2 1 4 Sudoku Puzzle 2 7 9 6 3 8 2 1 5 3 5 7 8 4 8 3 1 3 6 4 1 9 2 8
  • 2. Challenging Sudoku Puzzles - Book 1 From www.veryfreesudoku.com Sudoku Puzzle 3 5 4 9 7 8 4 5 3 2 5 6 4 1 2 8 7 9 5 3 2 7 8 3 5 1 Sudoku Puzzle 4 6 5 4 8 5 6 2 2 4 3 9 8 7 5 2 7 4 1 7 3 1 8 4
  • 3. Challenging Sudoku Puzzles - Book 1 From www.veryfreesudoku.com Sudoku Puzzle 5 5 3 1 1 2 4 5 4 5 6 2 3 5 9 6 7 4 3 9 1 6 9 5 7 2 1 7 Sudoku Puzzle 6 7 3 5 1 3 6 1 8 2 3 8 5 9 6 2 4 4 7 1 9 8
  • 4. Challenging Sudoku Puzzles - Book 1 From www.veryfreesudoku.com Sudoku Puzzle 7 9 3 4 5 2 7 3 9 5 8 2 1 7 1 6 4 8 9 1 2 8 7 5 4 1 3 Sudoku Puzzle 8 7 8 4 9 5 6 9 3 1 8 3 2 9 2 7 6 4 5 8 7 8 1
  • 5. Challenging Sudoku Puzzles - Book 1 From www.veryfreesudoku.com Sudoku Puzzle 9 1 9 4 2 1 7 5 4 6 3 8 7 6 5 5 4 2 3 1 5 7 8 8 9 7 9 3 8 Sudoku Puzzle 10 1 3 7 7 5 9 7 3 7 5 8 6 2 8 6 5 1 2 6 6 3 1
  • 6. Challenging Sudoku Puzzles - Book 1 From www.veryfreesudoku.com Sudoku Puzzle 11 9 6 5 3 2 8 6 7 9 3 1 9 4 8 7 6 1 2 7 4 8 2 6 3 Sudoku Puzzle 12 8 7 2 1 8 7 2 1 2 5 9 6 3 8 4 7 5 4 9 8 2 8
  • 7. Challenging Sudoku Puzzles - Book 1 From www.veryfreesudoku.com Sudoku Puzzle 13 1 5 9 4 9 3 7 5 7 1 1 3 6 2 2 7 9 4 1 3 6 4 2 4 7 Sudoku Puzzle 14 5 2 9 1 8 6 1 5 6 2 8 1 7 6 9 5 3 1 1 6 4 3 7
  • 8. Challenging Sudoku Puzzles - Book 1 From www.veryfreesudoku.com Sudoku Puzzle 15 6 1 2 8 5 3 3 5 4 2 6 5 7 8 6 8 5 1 2 9 5 7 6 6 5 Sudoku Puzzle 16 5 4 8 3 1 2 4 6 7 8 5 3 7 9 4 1 8 9 5 7 1 5 3 8
  • 9. Challenging Sudoku Puzzles - Book 1 From www.veryfreesudoku.com Sudoku Puzzle 17 2 4 9 4 2 3 7 8 7 5 9 6 5 7 8 1 6 9 1 4 5 8 6 3 1 8 Sudoku Puzzle 18 43 1 4 9 3 6 1 8 1 2 3 5 9 8 7 5 9 3 2 9 4 1 6
  • 10. Challenging Sudoku Puzzles - Book 1 From www.veryfreesudoku.com Sudoku Puzzle 1 Sudoku Puzzle 2 Sudoku Puzzle 3 1 9 6 3 8 7 2 4 5 9 1 5 6 4 3 8 7 2 3 1 5 8 4 6 7 2 9 8 4 7 5 9 2 6 1 3 8 4 7 1 5 2 3 9 6 2 9 6 3 1 7 4 8 5 3 2 5 1 6 4 7 9 8 3 2 6 8 9 7 1 4 5 7 8 4 5 2 9 6 1 3 2 3 8 7 1 6 9 5 4 2 6 1 4 8 9 5 3 7 9 4 8 7 3 1 2 5 6 9 6 1 4 5 3 8 2 7 5 3 9 2 7 6 4 8 1 6 3 7 2 5 8 9 4 1 5 7 4 8 2 9 3 6 1 4 7 8 3 1 5 6 2 9 1 5 2 6 9 4 8 3 7 4 8 2 6 7 1 5 3 9 6 8 4 7 2 1 9 5 3 8 2 1 9 6 5 3 7 4 7 1 9 2 3 5 4 8 6 7 5 3 9 6 8 2 1 4 5 6 3 4 7 2 1 9 8 6 5 3 9 4 8 1 7 2 1 9 2 5 3 4 7 6 8 4 7 9 1 8 3 5 6 2 Sudoku Puzzle 4 Sudoku Puzzle 5 Sudoku Puzzle 6 9 6 4 1 2 5 7 3 8 5 8 7 4 6 9 3 1 2 4 2 5 3 1 8 6 7 9 1 3 2 7 8 9 6 5 4 1 9 6 7 2 3 4 8 5 6 9 8 2 7 4 3 5 1 7 8 5 6 3 4 2 9 1 3 4 2 1 8 5 7 6 9 1 3 7 6 5 9 8 4 2 8 7 6 3 1 2 9 4 5 2 3 5 8 9 4 6 7 1 7 4 6 1 8 5 9 2 3 4 2 3 5 9 8 1 7 6 9 7 8 5 1 6 2 4 3 3 8 2 9 6 7 4 1 5 5 9 1 4 7 6 8 2 3 6 1 4 3 7 2 9 5 8 5 1 9 4 2 3 7 8 6 3 5 9 8 6 7 4 1 2 7 5 9 2 4 1 8 3 6 8 6 1 7 9 2 5 3 4 6 4 7 2 5 1 3 8 9 8 6 3 9 5 7 1 2 4 9 5 3 8 4 1 2 6 7 2 1 8 9 4 3 5 6 7 4 2 1 6 3 8 5 9 7 2 7 4 5 3 6 1 9 8 Sudoku Puzzle 7 Sudoku Puzzle 8 Sudoku Puzzle 9 9 7 1 8 6 3 5 2 4 4 8 6 5 1 9 3 2 7 2 6 1 9 7 3 5 8 4 5 6 4 2 9 7 3 8 1 2 3 1 7 6 8 4 9 5 3 8 4 5 6 2 1 9 7 3 2 8 5 4 1 7 6 9 5 7 9 2 4 3 8 1 6 7 9 5 1 8 4 2 6 3 6 9 5 4 3 8 2 1 7 9 2 5 8 7 4 1 6 3 5 3 6 2 4 9 8 7 1 8 1 2 7 5 9 6 4 3 6 4 3 1 9 5 7 8 2 4 7 2 6 1 8 9 3 5 7 4 3 6 1 2 9 5 8 8 1 7 3 2 6 9 5 4 9 1 8 7 3 5 4 2 6 4 5 7 3 8 6 1 9 2 3 5 2 4 8 1 6 7 9 8 2 7 4 5 6 3 1 9 1 3 6 9 2 4 8 7 5 1 6 4 9 5 7 2 3 8 6 5 9 3 2 1 7 4 8 2 8 9 1 7 5 4 3 6 7 9 8 6 3 2 5 4 1 1 4 3 8 9 7 6 5 2
  • 11. Challenging Sudoku Puzzles - Book 1 From www.veryfreesudoku.com Sudoku Puzzle 10 Sudoku Puzzle 11 Sudoku Puzzle 12 7 5 9 2 3 1 8 4 6 8 2 9 5 1 4 7 6 3 9 6 7 2 4 5 1 3 8 1 8 3 4 5 6 9 7 2 7 1 4 3 6 8 5 2 9 8 5 1 3 7 6 2 4 9 6 2 4 7 8 9 5 1 3 5 3 6 9 2 7 8 4 1 3 4 2 1 9 8 6 7 5 8 9 2 6 4 7 1 3 5 6 7 1 8 4 9 2 3 5 4 7 3 8 5 2 9 6 1 4 6 5 3 1 2 7 8 9 3 5 2 6 7 1 4 9 8 1 2 5 9 6 7 3 8 4 3 7 1 5 9 8 6 2 4 9 4 8 2 3 5 1 7 6 6 8 9 4 1 3 7 5 2 2 1 8 9 6 4 3 5 7 2 9 5 7 8 6 3 1 4 2 3 6 5 8 1 4 9 7 9 3 7 1 2 5 4 6 8 1 6 3 4 5 2 9 8 7 5 1 4 7 3 9 8 2 6 5 4 6 8 7 3 2 9 1 4 8 7 1 9 3 6 5 2 7 9 8 6 2 4 5 1 3 Sudoku Puzzle 13 Sudoku Puzzle 14 Sudoku Puzzle 15 3 7 2 8 4 1 5 6 9 2 1 9 5 8 4 6 7 3 8 6 3 9 5 7 2 1 4 9 6 1 5 2 7 8 3 4 7 5 3 2 6 9 4 1 8 4 2 9 1 6 3 5 7 8 5 8 4 9 3 6 1 2 7 8 4 6 1 3 7 9 2 5 7 1 5 2 8 4 3 9 6 6 5 8 7 9 4 3 1 2 6 2 7 3 9 5 8 4 1 3 8 6 7 4 5 1 2 9 1 9 3 6 5 2 7 4 8 9 8 1 4 7 6 3 5 2 1 9 4 3 2 6 8 5 7 4 2 7 3 1 8 9 5 6 4 3 5 8 2 1 7 6 9 5 7 2 8 9 1 4 6 3 7 3 5 2 6 9 4 8 1 5 9 2 7 4 3 1 8 6 2 4 1 6 3 9 7 8 5 2 4 9 1 8 3 6 7 5 3 7 8 6 1 2 5 9 4 6 5 7 4 1 8 9 3 2 8 1 6 4 7 5 2 9 3 1 6 4 9 5 8 2 3 7 9 3 8 5 7 2 6 4 1 Sudoku Puzzle 16 Sudoku Puzzle 17 Sudoku Puzzle 18 4 3 8 1 7 9 6 5 2 7 9 3 5 1 8 6 2 4 8 6 2 7 1 5 9 4 3 5 9 2 4 8 6 1 7 3 8 6 5 7 2 4 1 3 9 7 4 9 3 8 6 1 5 2 7 6 1 3 2 5 9 4 8 4 2 1 6 9 3 7 8 5 1 5 3 4 2 9 8 7 6 2 5 4 6 9 3 8 1 7 6 4 2 8 3 9 5 1 7 9 3 6 1 4 7 5 2 8 1 8 6 2 5 7 4 3 9 1 7 8 4 5 2 9 6 3 4 1 8 6 5 2 3 9 7 3 7 9 8 4 1 5 2 6 3 5 9 1 7 6 2 4 8 5 2 7 9 3 8 4 6 1 6 4 3 7 1 8 2 9 5 5 1 6 3 4 7 8 9 2 6 7 1 5 9 3 2 8 4 8 2 5 9 3 4 7 6 1 9 3 7 2 8 1 4 5 6 3 8 5 2 6 4 7 1 9 9 1 7 5 6 2 3 8 4 2 8 4 9 6 5 3 7 1 2 9 4 8 7 1 6 3 5
  • 12. Challenging Sudoku Puzzles - Book 10 From www.veryfreesudoku.com Sudoku Puzzle 1 7 9 2 7 8 3 6 4 3 7 8 4 5 9 2 5 5 2 7 6 1 3 9 2 5 1 7 Sudoku Puzzle 2 9 7 4 9 6 2 4 7 6 6 3 8 5 2 7 3 2 8 5 8 4 1
  • 13. Challenging Sudoku Puzzles - Book 10 From www.veryfreesudoku.com Sudoku Puzzle 3 4 1 7 9 5 3 2 7 1 8 2 5 1 8 7 6 4 5 2 6 6 5 9 8 2 7 2 5 Sudoku Puzzle 4 9 6 7 1 8 5 9 4 1 8 7 9 3 1 5 3 4 8 7
  • 14. Challenging Sudoku Puzzles - Book 10 From www.veryfreesudoku.com Sudoku Puzzle 5 1 9 7 7 2 4 1 5 3 3 1 2 4 4 6 5 4 8 2 7 6 5 7 9 6 4 3 Sudoku Puzzle 6 3 8 2 7 6 3 4 9 6 1 8 3 2 5 7 1 8 4 8 3
  • 15. Challenging Sudoku Puzzles - Book 10 From www.veryfreesudoku.com Sudoku Puzzle 7 4 3 5 2 3 9 5 1 6 4 3 1 1 2 7 8 3 3 9 6 4 2 7 8 6 4 2 Sudoku Puzzle 8 7 3 6 5 6 7 7 4 5 1 8 6 4 2 5 2 5 9 1 6 3 1
  • 16. Challenging Sudoku Puzzles - Book 10 From www.veryfreesudoku.com Sudoku Puzzle 9 5 4 2 3 8 7 9 8 2 6 3 9 4 1 2 9 8 9 1 3 1 8 7 4 7 1 Sudoku Puzzle 10 8 9 6 2 6 5 3 2 1 6 4 9 4 3 7 7 1 5 2 5 4 7
  • 17. Challenging Sudoku Puzzles - Book 10 From www.veryfreesudoku.com Sudoku Puzzle 11 1 7 8 3 2 4 6 8 2 9 3 7 5 7 3 6 2 8 9 5 1 2 1 6 5 7 Sudoku Puzzle 12 5 3 2 1 9 3 8 2 6 7 9 1 9 5 5 2 3 7 9 9 4
  • 18. Challenging Sudoku Puzzles - Book 10 From www.veryfreesudoku.com Sudoku Puzzle 13 8 1 6 4 4 1 2 7 2 8 1 3 5 5 7 7 9 8 4 3 4 6 3 8 6 Sudoku Puzzle 14 6 8 3 9 3 9 2 4 2 3 4 9 1 4 5 7 6 8 3 1 4
  • 19. Challenging Sudoku Puzzles - Book 10 From www.veryfreesudoku.com Sudoku Puzzle 15 7 4 5 6 5 8 3 7 1 4 8 3 6 4 5 9 1 1 8 5 6 4 3 2 8 4 1 3 Sudoku Puzzle 16 2 6 7 1 4 2 5 6 9 5 3 3 1 9 7 3 4 6 8 3 9 5
  • 20. Challenging Sudoku Puzzles - Book 10 From www.veryfreesudoku.com Sudoku Puzzle 17 2 6 4 5 5 6 9 3 4 5 6 3 7 2 8 9 3 1 8 6 4 9 7 8 8 6 7 Sudoku Puzzle 18 9 3 5 3 6 2 7 8 4 3 6 8 8 1 2 9 4 3 8 1 5
  • 21. Challenging Sudoku Puzzles - Book 10 From www.veryfreesudoku.com Sudoku Puzzle 1 Sudoku Puzzle 2 Sudoku Puzzle 3 4 3 1 6 5 7 8 2 9 2 4 5 8 1 7 9 3 6 5 8 4 1 3 7 2 6 9 2 9 7 8 1 3 5 6 4 3 6 1 9 2 5 8 7 4 7 6 2 4 9 8 1 5 3 5 8 6 4 2 9 1 3 7 8 7 9 3 4 6 5 1 2 1 3 9 2 6 5 4 7 8 6 2 9 5 8 1 7 4 3 4 2 7 5 9 8 1 6 3 3 9 1 7 4 6 8 2 5 3 4 5 9 7 6 2 1 8 5 9 6 1 7 3 4 2 8 6 4 5 8 2 1 9 3 7 1 7 8 2 3 4 6 9 5 1 3 8 2 6 4 7 5 9 8 2 7 9 5 3 6 4 1 8 5 3 1 9 2 4 7 6 6 8 3 4 5 1 2 9 7 9 7 3 6 8 2 5 1 4 7 1 4 3 6 5 9 8 2 9 1 4 7 3 2 6 8 5 2 5 8 3 1 4 7 9 6 9 6 2 7 4 8 3 5 1 7 5 2 6 8 9 3 4 1 4 1 6 5 7 9 3 8 2 Sudoku Puzzle 4 Sudoku Puzzle 5 Sudoku Puzzle 6 8 1 7 4 3 9 2 5 6 4 1 9 8 3 5 7 6 2 6 1 9 2 4 3 5 8 7 4 9 3 6 2 5 8 1 7 3 5 6 7 9 2 4 1 8 7 5 3 8 6 9 4 2 1 6 5 2 7 1 8 9 3 4 7 8 2 1 4 6 5 9 3 8 2 4 7 1 5 3 6 9 3 6 5 2 9 4 1 7 8 6 3 1 2 8 7 9 4 5 3 6 1 9 7 8 2 4 5 2 7 8 1 5 6 4 9 3 8 9 4 5 6 3 2 7 1 9 7 2 4 5 6 8 1 3 1 4 9 3 8 7 6 2 5 5 2 7 9 1 4 8 3 6 5 4 8 3 2 1 9 7 6 7 3 6 9 4 2 5 8 1 9 4 8 6 5 1 3 2 7 1 3 6 5 8 2 7 9 4 5 2 1 8 6 3 7 4 9 1 7 3 4 2 8 6 5 9 2 9 7 6 3 4 1 5 8 9 8 4 5 7 1 3 6 2 2 6 5 3 7 9 1 8 4 4 8 5 1 9 7 6 3 2 Sudoku Puzzle 7 Sudoku Puzzle 8 Sudoku Puzzle 9 2 4 9 3 7 8 5 1 6 5 7 6 9 1 8 4 2 3 6 1 5 3 8 2 9 4 7 1 7 6 4 2 5 8 3 9 8 1 4 2 7 3 9 6 5 2 3 8 7 4 9 5 6 1 3 8 5 9 1 6 2 4 7 2 9 3 6 5 4 8 1 7 7 9 4 5 1 6 3 8 2 4 3 7 5 9 1 6 8 2 7 4 5 8 3 6 2 9 1 1 8 2 4 6 3 7 5 9 8 9 1 6 3 2 4 7 5 3 2 8 7 9 1 5 4 6 4 6 9 1 5 7 2 3 8 5 6 2 8 4 7 1 9 3 9 6 1 4 2 5 3 7 8 3 5 7 2 9 8 6 1 4 7 2 8 1 5 3 9 6 4 1 5 2 3 4 7 6 8 9 8 4 6 9 2 5 1 7 3 9 1 3 2 6 4 7 5 8 4 8 7 5 6 9 1 3 2 9 7 1 6 3 4 8 2 5 6 5 4 7 8 9 3 2 1 6 3 9 1 8 2 7 5 4 5 2 3 8 7 1 4 9 6
  • 22. Challenging Sudoku Puzzles - Book 10 From www.veryfreesudoku.com Sudoku Puzzle 10 Sudoku Puzzle 11 Sudoku Puzzle 12 6 5 3 4 2 7 1 9 8 6 1 9 8 3 5 4 7 2 9 3 4 1 2 6 5 7 8 7 8 4 5 9 1 6 3 2 8 2 4 9 1 7 6 3 5 1 7 5 9 8 4 2 3 6 2 9 1 3 8 6 4 5 7 5 3 7 2 4 6 9 8 1 2 6 8 7 5 3 1 4 9 3 6 7 2 4 9 5 8 1 9 8 5 4 6 3 2 1 7 3 5 7 6 4 1 9 8 2 8 1 2 7 6 5 3 4 9 2 4 1 7 8 9 5 6 3 4 2 6 8 7 9 3 5 1 9 4 5 8 1 3 2 7 6 3 7 6 5 2 1 8 9 4 8 1 9 2 3 5 4 6 7 4 7 6 1 5 8 9 2 3 4 9 8 1 7 2 3 5 6 5 8 2 3 1 7 6 9 4 5 3 9 6 7 2 8 1 4 1 6 2 3 5 8 7 4 9 6 4 1 5 9 8 7 2 3 1 2 8 9 3 4 7 6 5 7 5 3 6 9 4 1 2 8 7 9 3 4 6 2 8 1 5 Sudoku Puzzle 13 Sudoku Puzzle 14 Sudoku Puzzle 15 7 8 5 2 1 4 3 9 6 8 2 5 3 9 4 1 7 6 7 5 2 8 6 4 9 1 3 2 3 6 9 7 8 5 1 4 4 6 7 1 5 8 3 9 2 1 8 4 9 3 5 6 2 7 9 4 1 3 6 5 2 8 7 3 1 9 6 2 7 8 4 5 6 3 9 1 2 7 5 8 4 4 9 3 6 5 2 8 7 1 2 5 3 8 7 9 4 6 1 3 4 8 7 1 6 2 5 9 8 6 7 1 3 9 4 5 2 9 8 1 4 6 3 2 5 7 2 1 5 4 9 8 3 7 6 5 1 2 4 8 7 9 6 3 7 4 6 2 1 5 9 8 3 9 7 6 3 5 2 8 4 1 6 7 9 8 2 3 1 4 5 1 9 2 7 4 6 5 3 8 5 9 3 2 7 1 4 6 8 3 5 8 7 4 1 6 2 9 5 7 8 9 3 2 6 1 4 4 2 1 6 8 3 7 9 5 1 2 4 5 9 6 7 3 8 6 3 4 5 8 1 7 2 9 8 6 7 5 4 9 1 3 2 Sudoku Puzzle 16 Sudoku Puzzle 17 Sudoku Puzzle 18 8 4 9 2 1 5 3 6 7 7 5 2 9 6 3 8 1 4 8 6 5 2 1 7 3 9 4 2 5 6 7 8 3 1 9 4 6 9 4 5 1 8 7 2 3 2 9 7 3 8 4 6 1 5 3 1 7 4 6 9 2 5 8 3 8 1 7 2 4 9 5 6 3 1 4 6 5 9 2 7 8 7 8 4 6 2 1 9 3 5 9 1 7 3 4 2 6 8 5 6 5 2 7 9 8 4 3 1 5 9 2 8 3 7 4 1 6 5 6 3 8 7 1 4 9 2 7 8 3 1 4 2 9 5 6 6 3 1 5 9 4 8 7 2 2 4 8 6 9 5 3 7 1 1 4 9 5 3 6 7 8 2 9 2 8 1 5 6 7 4 3 4 3 5 1 8 9 2 6 7 5 7 8 4 6 3 1 2 9 1 7 5 3 4 2 6 8 9 8 2 6 4 5 7 1 3 9 4 3 1 9 2 5 8 6 7 4 6 3 9 7 8 5 2 1 1 7 9 2 3 6 5 4 8 9 2 6 8 7 1 5 4 3
  • 23. Challenging Sudoku Puzzles - Book 2 From www.veryfreesudoku.com Sudoku Puzzle 1 5 1 7 1 8 4 6 8 5 7 2 9 4 5 1 2 1 3 1 7 4 8 3 8 9 4 2 Sudoku Puzzle 2 1 7 5 6 8 7 1 5 6 3 8 5 4 4 6 5 8 5 7 3
  • 24. Challenging Sudoku Puzzles - Book 2 From www.veryfreesudoku.com Sudoku Puzzle 3 4 7 8 5 9 7 8 4 3 8 9 4 6 8 5 2 7 4 1 9 2 1 3 9 6 2 Sudoku Puzzle 4 5 8 8 3 9 1 5 9 7 4 9 7 5 1 3 6 2 5 1 8 3 1 7
  • 25. Challenging Sudoku Puzzles - Book 2 From www.veryfreesudoku.com Sudoku Puzzle 5 6 8 3 9 5 3 1 7 1 2 9 6 1 8 3 4 9 1 2 3 4 5 1 5 9 8 3 Sudoku Puzzle 6 2 6 7 9 8 3 5 6 4 6 8 3 8 7 1 4 5 4 1 2 3 7
  • 26. Challenging Sudoku Puzzles - Book 2 From www.veryfreesudoku.com Sudoku Puzzle 7 3 4 2 9 7 6 5 6 8 3 1 3 6 9 5 4 1 3 7 4 4 6 1 3 2 9 Sudoku Puzzle 8 2 8 8 2 7 3 6 7 8 7 4 9 4 6 5 2 3 5 1 1 4 5 4 8
  • 27. Challenging Sudoku Puzzles - Book 2 From www.veryfreesudoku.com Sudoku Puzzle 9 3 8 7 4 1 3 6 9 7 8 7 6 9 2 8 1 5 2 8 6 4 1 5 3 9 3 7 8 5 Sudoku Puzzle 10 2 1 7 2 4 6 2 6 8 5 3 9 8 9 6 7 5 1 3
  • 28. Challenging Sudoku Puzzles - Book 2 From www.veryfreesudoku.com Sudoku Puzzle 11 6 8 3 7 6 5 7 4 1 4 9 2 5 6 4 2 3 1 7 8 5 7 2 1 9 8 2 Sudoku Puzzle 12 5 6 1 7 3 6 4 1 6 9 8 7 3 6 4 9 1 2 9 4 6 7 6 5
  • 29. Challenging Sudoku Puzzles - Book 2 From www.veryfreesudoku.com Sudoku Puzzle 13 1 2 8 5 9 4 9 6 7 4 7 1 5 3 9 2 6 3 1 2 8 7 3 1 Sudoku Puzzle 14 7 1 2 9 3 4 8 6 1 5 9 8 4 6 9 5 7 4 8 2 1 5 3
  • 30. Challenging Sudoku Puzzles - Book 2 From www.veryfreesudoku.com Sudoku Puzzle 15 7 2 6 5 4 3 2 8 8 1 5 2 9 6 7 9 6 9 3 7 2 1 7 4 3 3 9 7 Sudoku Puzzle 16 7 5 8 1 2 5 7 4 2 1 4 8 5 9 3 2 7 8 6 3 9
  • 31. Challenging Sudoku Puzzles - Book 2 From www.veryfreesudoku.com Sudoku Puzzle 17 1 7 6 2 3 9 6 7 7 4 5 6 3 8 9 1 7 2 5 3 6 3 7 4 7 9 5 9 4 7 8 Sudoku Puzzle 18 2 8 4 9 8 9 6 4 8 1 5 3 4 5 2 8 8 6 1 7 5
  • 32. Challenging Sudoku Puzzles - Book 2 From www.veryfreesudoku.com Sudoku Puzzle 1 Sudoku Puzzle 2 Sudoku Puzzle 3 5 4 1 6 7 8 2 9 3 6 3 9 4 5 1 8 2 7 6 2 4 1 9 3 8 5 7 6 2 3 9 4 5 7 1 8 2 1 8 3 9 7 6 5 4 3 8 5 7 4 2 9 1 6 7 9 8 3 2 1 6 5 4 7 5 4 6 8 2 1 3 9 9 1 7 5 6 8 4 3 2 3 8 2 4 9 7 1 6 5 8 7 1 9 2 3 5 4 6 7 3 8 9 2 4 5 6 1 1 6 7 5 8 2 4 3 9 5 4 3 1 7 6 2 9 8 1 6 2 8 5 7 3 4 9 4 5 9 1 6 3 8 2 7 9 2 6 5 4 8 7 1 3 5 4 9 6 3 1 2 7 8 8 7 5 2 1 9 3 4 6 4 6 7 2 1 9 3 8 5 4 7 3 2 8 6 1 9 5 9 1 6 7 3 4 5 8 2 3 9 2 8 6 5 4 7 1 2 9 6 4 1 5 7 8 3 2 3 4 8 5 6 9 7 1 1 8 5 7 3 4 9 6 2 8 5 1 3 7 9 6 2 4 Sudoku Puzzle 4 Sudoku Puzzle 5 Sudoku Puzzle 6 7 1 6 9 3 5 4 8 2 6 7 1 5 4 8 3 9 2 8 4 5 1 7 3 9 2 6 5 3 9 4 2 8 6 7 1 4 3 9 6 1 2 5 7 8 9 3 1 2 6 8 7 5 4 2 8 4 1 7 6 3 5 9 5 8 2 9 3 7 4 6 1 6 2 7 4 5 9 8 3 1 1 6 2 8 5 3 9 4 7 7 1 8 4 2 5 6 3 9 7 1 9 5 8 6 2 4 3 8 4 3 2 9 7 1 6 5 9 2 6 1 7 3 8 4 5 4 5 2 7 3 1 6 8 9 9 7 5 6 4 1 2 3 8 3 4 5 8 9 6 2 1 7 3 6 8 9 2 4 5 1 7 3 9 8 7 6 2 5 1 4 8 6 7 3 5 1 9 2 4 1 7 6 8 4 2 3 9 5 6 2 7 5 1 4 8 9 3 2 9 3 7 8 4 1 5 6 5 8 4 3 9 7 1 6 2 4 5 1 3 8 9 7 2 6 1 5 4 2 6 9 7 8 3 2 9 3 6 1 5 4 7 8 Sudoku Puzzle 7 Sudoku Puzzle 8 Sudoku Puzzle 9 3 8 5 4 6 2 9 1 7 8 1 2 3 6 5 7 9 4 7 9 3 2 5 4 1 6 8 4 2 7 9 3 1 8 6 5 3 7 5 9 1 4 2 6 8 5 6 8 1 7 9 3 4 2 1 9 6 8 5 7 4 2 3 6 4 9 8 2 7 5 1 3 4 2 1 3 6 8 5 9 7 9 7 1 5 4 8 2 3 6 9 5 1 6 8 2 4 3 7 8 1 4 9 3 5 7 2 6 2 3 8 7 9 6 5 4 1 2 8 7 4 3 1 9 5 6 9 3 6 7 4 2 8 5 1 5 6 4 1 2 3 7 8 9 4 6 3 5 7 9 8 2 1 2 7 5 8 1 6 4 3 9 7 1 2 3 8 9 6 5 4 7 3 4 2 5 6 1 8 9 3 4 7 6 9 1 2 8 5 8 4 9 6 1 5 3 7 2 1 2 8 7 9 3 6 4 5 6 5 2 4 8 7 9 1 3 6 5 3 2 7 4 1 9 8 5 9 6 1 4 8 3 7 2 1 8 9 5 2 3 6 7 4
  • 33. Challenging Sudoku Puzzles - Book 2 From www.veryfreesudoku.com Sudoku Puzzle 10 Sudoku Puzzle 11 Sudoku Puzzle 12 1 9 2 3 6 7 8 5 4 1 9 4 6 5 8 2 3 7 5 8 6 1 7 9 4 2 3 6 8 5 9 2 4 3 1 7 7 6 3 2 4 9 5 1 8 2 4 9 3 5 6 8 1 7 3 4 7 8 1 5 2 9 6 5 2 8 1 7 3 6 9 4 7 1 3 8 2 4 5 9 6 5 7 4 2 9 3 1 6 8 2 8 1 3 6 7 9 4 5 4 7 1 2 6 8 3 5 9 2 1 9 6 4 8 5 7 3 4 7 9 5 8 2 3 6 1 9 2 8 7 3 5 6 4 1 8 3 6 5 7 1 4 2 9 3 5 6 9 1 4 8 7 2 3 6 5 4 9 1 7 8 2 4 2 1 7 8 6 9 3 5 9 4 2 8 3 1 7 5 6 8 3 7 5 1 2 9 6 4 9 6 3 4 5 2 7 8 1 8 1 5 7 9 6 4 2 3 1 9 4 6 8 7 2 3 5 7 5 8 1 3 9 6 4 2 6 3 7 4 2 5 1 8 9 6 5 2 9 4 3 1 7 8 Sudoku Puzzle 13 Sudoku Puzzle 14 Sudoku Puzzle 15 5 6 3 4 1 7 9 2 8 4 2 6 8 5 7 9 3 1 7 5 1 4 9 3 2 6 8 8 1 7 2 5 9 6 4 3 5 8 7 1 3 9 4 2 6 2 3 8 6 1 7 4 9 5 4 9 2 6 8 3 1 7 5 1 9 3 6 2 4 7 5 8 4 6 9 8 5 2 7 3 1 3 2 8 1 4 5 7 9 6 6 1 8 7 4 2 3 9 5 9 2 3 7 8 6 5 1 4 9 5 4 3 7 6 2 8 1 9 3 2 5 1 8 6 4 7 8 7 6 1 4 5 3 2 9 6 7 1 8 9 2 5 3 4 7 5 4 9 6 3 1 8 2 1 4 5 2 3 9 6 8 7 1 4 5 9 2 8 3 6 7 2 6 1 3 9 5 8 7 4 3 8 7 5 2 1 9 4 6 7 3 9 5 6 4 8 1 2 3 7 5 4 8 6 2 1 9 5 9 4 3 6 8 1 7 2 2 8 6 7 3 1 4 5 9 8 4 9 2 7 1 5 6 3 6 1 2 9 7 4 8 5 3 Sudoku Puzzle 16 Sudoku Puzzle 17 Sudoku Puzzle 18 8 3 9 7 2 6 4 1 5 5 4 1 9 7 8 6 2 3 3 5 9 4 6 1 7 2 8 2 7 4 5 1 8 6 9 3 3 8 9 6 5 2 4 1 7 2 4 1 9 8 7 5 6 3 5 1 6 3 4 9 7 8 2 7 6 2 4 1 3 8 9 5 6 7 8 3 5 2 4 9 1 3 6 2 1 9 7 8 5 4 2 3 4 7 9 1 5 8 6 8 1 5 7 4 9 6 3 2 7 9 5 4 8 2 1 3 6 6 1 5 3 8 4 9 7 2 7 2 4 8 3 6 9 1 5 4 8 1 6 5 3 9 2 7 8 9 7 5 2 6 3 4 1 9 6 3 2 1 5 8 7 4 6 5 8 9 3 4 2 7 1 9 7 8 2 6 5 1 3 4 1 9 7 5 2 8 3 4 6 9 4 3 2 7 1 5 6 8 4 2 6 1 3 9 7 5 8 4 8 6 1 7 3 2 5 9 1 2 7 8 6 5 3 4 9 1 5 3 8 4 7 2 6 9 5 3 2 6 9 4 1 8 7
  • 34. Challenging Sudoku Puzzles - Book 3 From www.veryfreesudoku.com Sudoku Puzzle 1 9 5 7 1 4 5 2 2 5 3 1 6 9 5 7 3 1 8 2 7 3 3 2 8 8 7 4 3 Sudoku Puzzle 2 4 2 1 3 5 9 9 4 5 2 1 7 5 4 8 7 1 6 7 3
  • 35. Challenging Sudoku Puzzles - Book 3 From www.veryfreesudoku.com Sudoku Puzzle 3 9 6 8 7 3 1 4 7 9 3 1 5 2 3 9 5 8 2 6 3 2 9 6 5 7 5 3 6 8 9 2 Sudoku Puzzle 4 8 9 8 3 2 1 4 5 9 3 2 1 5 8 6 5 2 9 7 6 4
  • 36. Challenging Sudoku Puzzles - Book 3 From www.veryfreesudoku.com Sudoku Puzzle 5 9 5 2 4 5 2 6 8 7 1 1 9 2 9 3 5 7 3 6 7 8 2 1 7 2 8 5 Sudoku Puzzle 6 1 2 3 1 6 4 2 6 5 7 9 6 3 1 8 6 1 7 8 4 2
  • 37. Challenging Sudoku Puzzles - Book 3 From www.veryfreesudoku.com Sudoku Puzzle 7 1 7 3 3 9 7 2 8 6 2 1 9 4 7 2 5 6 2 8 1 9 4 5 4 5 Sudoku Puzzle 8 9 8 1 7 1 9 3 5 8 2 6 7 2 5 9 7 5 4 6
  • 38. Challenging Sudoku Puzzles - Book 3 From www.veryfreesudoku.com Sudoku Puzzle 9 6 3 5 3 7 1 2 4 5 5 3 8 9 2 6 1 5 3 7 4 7 4 1 1 9 Sudoku Puzzle 10 2 4 4 5 6 1 3 9 6 8 5 9 7 8 2 3 5 7 8 5 1 4
  • 39. Challenging Sudoku Puzzles - Book 3 From www.veryfreesudoku.com Sudoku Puzzle 11 9 8 3 6 3 7 5 2 4 1 6 3 2 8 1 6 7 4 7 9 4 5 8 1 3 7 5 Sudoku Puzzle 12 9 4 9 8 2 2 1 9 7 5 4 3 8 4 2 6 4 8 9
  • 40. Challenging Sudoku Puzzles - Book 3 From www.veryfreesudoku.com Sudoku Puzzle 13 2 7 5 9 8 6 3 7 4 2 2 5 3 6 7 4 9 8 5 1 9 3 2 1 7 3 4 8 Sudoku Puzzle 14 2 9 6 5 5 1 9 3 8 3 6 1 4 1 6 9 4 5 1 8 5 9
  • 41. Challenging Sudoku Puzzles - Book 3 From www.veryfreesudoku.com Sudoku Puzzle 15 2 1 6 8 5 6 9 8 3 1 8 6 7 9 1 8 3 9 6 2 3 7 5 7 4 8 1 4 5 Sudoku Puzzle 16 5 7 3 4 6 8 7 4 2 1 5 3 6 6 1 5 8 3 4 9
  • 42. Challenging Sudoku Puzzles - Book 3 From www.veryfreesudoku.com Sudoku Puzzle 17 1 2 8 1 5 9 7 6 8 7 2 6 4 7 9 8 1 3 3 2 9 4 5 7 7 2 4 Sudoku Puzzle 18 9 3 8 3 7 2 6 5 9 2 4 7 6 5 3 2 7 6 8 4 1
  • 43. Challenging Sudoku Puzzles - Book 3 From www.veryfreesudoku.com Sudoku Puzzle 1 Sudoku Puzzle 2 Sudoku Puzzle 3 2 3 8 1 6 9 4 5 7 8 7 1 5 9 6 4 2 3 9 1 2 6 3 8 7 5 4 6 1 4 3 5 7 9 8 2 4 9 6 3 2 8 7 5 1 7 3 6 9 4 5 1 2 8 5 7 9 8 4 2 1 6 3 3 2 5 7 4 1 9 8 6 5 8 4 7 2 1 6 9 3 8 4 1 9 3 6 7 2 5 2 6 9 8 1 4 5 3 7 1 6 3 4 5 2 9 8 7 7 2 3 5 8 1 6 9 4 7 5 4 6 3 2 8 1 9 8 2 7 3 9 6 4 1 5 9 5 6 2 7 4 8 3 1 1 3 8 9 7 5 6 4 2 4 9 5 8 1 7 2 3 6 4 9 5 6 1 3 2 7 8 6 4 3 2 5 9 1 7 8 3 7 1 2 8 4 5 6 9 1 8 2 7 9 5 3 4 6 5 8 7 1 6 3 2 9 4 6 5 8 1 7 9 3 4 2 3 6 7 4 2 8 5 1 9 9 1 2 4 8 7 3 6 5 2 4 9 5 6 3 8 7 1 Sudoku Puzzle 4 Sudoku Puzzle 5 Sudoku Puzzle 6 6 8 4 3 5 9 2 7 1 9 8 3 7 2 6 1 4 5 9 7 6 4 3 2 8 5 1 7 5 9 1 2 4 6 3 8 5 4 2 1 9 3 8 6 7 1 4 5 9 6 8 7 2 3 1 3 2 8 6 7 5 9 4 6 7 1 4 5 8 9 3 2 2 3 8 5 1 7 6 9 4 9 1 8 6 3 2 7 4 5 3 5 6 8 4 2 7 9 1 4 9 7 3 2 6 5 1 8 3 2 6 7 4 5 8 1 9 7 1 8 5 6 9 4 2 3 5 8 1 7 4 9 2 3 6 4 7 5 9 8 1 3 2 6 2 9 4 3 1 7 6 5 8 3 6 2 8 5 1 4 7 9 2 9 1 5 7 8 4 6 3 4 6 5 2 7 1 3 8 9 7 1 3 2 8 4 9 6 5 5 4 3 2 1 6 9 8 7 1 3 9 6 8 5 2 7 4 6 2 4 1 9 5 3 8 7 8 6 7 4 9 3 1 5 2 8 2 7 9 3 4 5 1 6 8 5 9 6 7 3 1 4 2 Sudoku Puzzle 7 Sudoku Puzzle 8 Sudoku Puzzle 9 8 1 9 6 2 7 4 5 3 1 4 5 3 2 9 7 8 6 8 6 2 5 1 9 4 3 7 6 3 5 4 1 8 2 7 9 9 2 6 8 7 1 4 5 3 4 5 3 6 8 7 2 1 9 7 4 2 3 5 9 6 8 1 7 3 8 6 5 4 2 1 9 1 7 9 3 2 4 5 6 8 2 7 1 8 6 3 5 9 4 4 9 1 7 8 2 3 6 5 5 4 6 9 7 1 3 8 2 4 9 6 2 7 5 1 3 8 6 5 7 4 9 3 1 2 8 9 3 8 2 6 5 7 4 1 5 8 3 1 9 4 7 2 6 3 8 2 1 6 5 9 4 7 2 1 7 4 3 8 9 5 6 1 5 7 9 3 6 8 4 2 8 7 4 2 3 6 5 9 1 3 2 5 8 9 6 1 7 4 3 2 4 5 8 1 9 6 7 2 6 9 5 1 7 8 3 4 7 8 4 1 5 2 6 9 3 9 6 8 7 4 2 3 1 5 5 1 3 9 4 8 6 7 2 6 9 1 7 4 3 8 2 5
  • 44. Challenging Sudoku Puzzles - Book 3 From www.veryfreesudoku.com Sudoku Puzzle 10 Sudoku Puzzle 11 Sudoku Puzzle 12 2 6 3 1 8 5 4 9 7 6 8 2 1 5 3 4 7 9 3 8 7 9 5 2 1 6 4 9 1 7 2 4 6 8 3 5 1 7 5 9 8 4 3 6 2 4 9 2 6 8 1 5 7 3 4 8 5 9 7 3 6 2 1 3 4 9 2 6 7 5 1 8 6 1 5 4 7 3 9 8 2 8 3 9 6 5 1 7 4 2 5 2 7 4 9 8 1 3 6 7 4 1 8 3 5 6 2 9 7 4 1 8 3 2 5 6 9 9 6 4 7 3 1 2 8 5 8 3 6 2 1 9 4 5 7 6 5 2 4 9 7 1 8 3 8 1 3 6 2 5 7 9 4 5 2 9 7 4 6 3 1 8 1 2 4 7 6 9 3 5 8 7 3 6 8 4 2 9 5 1 9 7 3 5 6 8 2 4 1 3 7 8 5 2 4 9 1 6 4 9 1 5 7 6 8 2 3 2 5 8 1 9 4 7 3 6 5 9 6 3 1 8 2 7 4 2 5 8 3 1 9 6 4 7 1 6 4 3 2 7 8 9 5 Sudoku Puzzle 13 Sudoku Puzzle 14 Sudoku Puzzle 15 3 2 4 1 7 5 6 8 9 1 3 5 4 2 7 8 9 6 2 1 3 6 7 4 8 5 9 1 5 9 8 6 2 3 7 4 2 8 4 9 6 1 5 3 7 4 8 6 5 3 9 1 7 2 8 7 6 4 9 3 2 5 1 7 6 9 3 8 5 4 2 1 9 7 5 1 2 8 4 3 6 9 4 7 5 1 6 8 2 3 5 9 7 2 4 6 3 1 8 1 5 4 7 8 2 9 6 3 2 8 5 9 3 4 7 1 6 3 2 6 1 5 8 9 7 4 7 6 9 3 4 5 2 1 8 6 3 1 7 2 8 4 9 5 8 4 1 7 9 3 2 6 5 8 3 2 9 1 6 7 4 5 4 9 8 3 5 7 1 6 2 6 1 8 5 3 9 7 4 2 6 4 8 2 5 1 3 9 7 7 1 2 6 4 9 5 3 8 9 5 2 6 7 4 1 8 3 5 2 7 4 9 3 6 8 1 5 6 3 2 8 1 9 4 7 4 7 3 8 1 2 6 5 9 3 9 1 8 6 7 5 2 4 Sudoku Puzzle 16 Sudoku Puzzle 17 Sudoku Puzzle 18 3 9 8 1 4 7 6 2 5 1 3 9 7 5 2 6 4 8 1 5 7 9 2 6 8 4 3 5 6 7 2 3 8 1 9 4 8 7 6 9 4 3 2 1 5 4 9 2 8 3 7 1 6 5 1 4 2 6 5 9 7 8 3 4 5 2 1 6 8 7 3 9 6 8 3 1 4 5 7 2 9 2 7 3 9 6 1 5 4 8 7 4 5 3 2 6 9 8 1 7 6 8 4 5 9 3 1 2 9 5 6 4 8 3 2 7 1 9 8 3 4 7 1 5 2 6 3 1 9 6 7 2 4 5 8 4 8 1 7 2 5 3 6 9 2 6 1 8 9 5 4 7 3 5 2 4 3 1 8 9 7 6 7 2 9 3 1 4 8 5 6 5 9 8 2 1 4 3 6 7 8 4 1 5 6 3 2 9 7 6 1 5 8 9 2 4 3 7 3 2 7 6 8 9 1 5 4 2 3 5 7 9 1 6 8 4 8 3 4 5 7 6 9 1 2 6 1 4 5 3 7 8 9 2 9 7 6 2 8 4 5 3 1
  • 45. Challenging Sudoku Puzzles - Book 4 From www.veryfreesudoku.com Sudoku Puzzle 1 9 3 8 5 1 2 8 4 1 2 5 8 7 2 7 5 9 1 8 9 3 4 6 3 5 8 1 9 7 2 Sudoku Puzzle 2 9 3 7 1 6 4 8 2 7 4 1 8 6 2 5 3 9 7 9 7
  • 46. Challenging Sudoku Puzzles - Book 4 From www.veryfreesudoku.com Sudoku Puzzle 3 2 4 1 6 5 9 1 6 7 6 7 9 4 5 3 1 6 5 7 6 2 3 5 4 8 8 9 3 Sudoku Puzzle 4 1 8 5 7 4 9 6 5 4 3 9 5 7 9 2 7 4 4 2 8 6
  • 47. Challenging Sudoku Puzzles - Book 4 From www.veryfreesudoku.com Sudoku Puzzle 5 3 2 5 1 8 4 1 9 5 4 2 7 7 1 8 2 9 6 9 5 7 4 3 1 4 7 3 Sudoku Puzzle 6 5 8 5 1 2 1 6 7 9 8 4 2 6 5 9 3 8 1 7 3 9
  • 48. Challenging Sudoku Puzzles - Book 4 From www.veryfreesudoku.com Sudoku Puzzle 7 1 3 2 7 4 9 3 6 9 6 5 3 4 8 1 4 9 1 5 8 3 7 2 9 1 Sudoku Puzzle 8 6 1 7 8 4 3 5 1 3 6 9 5 2 9 2 7 4 1 2 3 4 9 3 7
  • 49. Challenging Sudoku Puzzles - Book 4 From www.veryfreesudoku.com Sudoku Puzzle 9 8 7 6 3 5 9 6 1 7 4 9 1 7 5 8 6 3 7 4 5 8 9 4 6 8 5 6 Sudoku Puzzle 10 7 5 8 4 8 3 7 1 4 1 8 2 5 3 9 5 4 2 7 1 3 7 4
  • 50. Challenging Sudoku Puzzles - Book 4 From www.veryfreesudoku.com Sudoku Puzzle 11 7 6 9 3 4 8 6 9 1 2 6 9 3 8 5 3 8 3 8 6 7 8 6 1 2 9 5 3 2 Sudoku Puzzle 12 3 3 9 6 8 6 1 4 9 8 2 2 6 5 1 4 8 5 1 9 3
  • 51. Challenging Sudoku Puzzles - Book 4 From www.veryfreesudoku.com Sudoku Puzzle 13 2 7 5 7 6 3 4 4 4 1 4 8 5 6 9 3 9 8 9 6 7 2 1 4 3 9 Sudoku Puzzle 14 7 7 3 5 1 7 3 5 4 2 6 7 4 5 4 9 7 6 1 3 4 2
  • 52. Challenging Sudoku Puzzles - Book 4 From www.veryfreesudoku.com Sudoku Puzzle 15 6 9 3 3 8 4 5 9 3 8 1 8 7 3 9 4 9 1 5 8 4 6 7 2 6 9 Sudoku Puzzle 16 4 3 6 5 4 8 9 2 9 8 1 7 8 3 1 9 8 6 6 5 6 3 1 7 2
  • 53. Challenging Sudoku Puzzles - Book 4 From www.veryfreesudoku.com Sudoku Puzzle 17 2 8 6 3 4 7 1 1 2 6 7 9 5 3 1 9 9 8 1 5 4 4 7 4 7 5 Sudoku Puzzle 18 3 5 6 2 5 8 1 6 2 2 9 1 8 4 9 8 6 7 8 9 4
  • 54. Challenging Sudoku Puzzles - Book 4 From www.veryfreesudoku.com Sudoku Puzzle 1 Sudoku Puzzle 2 Sudoku Puzzle 3 4 9 6 7 3 8 1 2 5 8 1 6 3 9 7 2 5 4 9 7 2 4 6 8 3 5 1 1 7 5 2 4 6 3 8 9 5 2 9 6 4 8 3 7 1 1 8 6 5 7 3 9 4 2 3 2 8 9 1 5 7 6 4 3 7 4 2 5 1 9 6 8 3 4 5 1 9 2 6 7 8 6 3 1 4 8 2 9 5 7 6 4 3 7 1 5 8 2 9 8 2 1 6 3 7 5 9 4 9 8 4 1 5 7 2 3 6 7 9 5 8 3 2 1 4 6 4 6 9 2 5 1 7 8 3 7 5 2 3 6 9 4 1 8 1 8 2 9 6 4 7 3 5 7 5 3 9 8 4 1 2 6 5 4 7 8 2 1 6 9 3 2 6 1 5 8 3 4 9 7 5 3 8 7 4 6 2 1 9 8 1 9 6 7 3 5 4 2 4 5 7 1 2 9 6 8 3 6 1 7 8 2 9 4 3 5 2 6 3 5 9 4 8 7 1 9 3 8 4 7 6 5 1 2 2 9 4 3 1 5 8 6 7 Sudoku Puzzle 4 Sudoku Puzzle 5 Sudoku Puzzle 6 4 7 5 8 6 9 1 2 3 5 8 9 7 4 6 1 3 2 1 4 7 8 9 6 5 3 2 9 2 3 4 1 7 8 5 6 7 3 2 5 1 8 4 6 9 6 2 9 5 4 3 8 1 7 1 8 6 3 5 2 7 4 9 4 1 6 9 3 2 8 7 5 3 8 5 7 1 2 9 4 6 6 3 9 5 8 1 2 7 4 9 5 1 4 6 3 2 8 7 2 1 8 6 7 9 4 5 3 2 1 8 7 4 3 6 9 5 2 6 7 8 9 1 5 4 3 7 9 6 3 5 4 1 2 8 7 5 4 9 2 6 3 8 1 3 4 8 2 5 7 9 1 6 5 3 4 1 2 8 6 7 9 8 9 7 6 3 5 4 1 2 6 9 3 1 8 5 7 2 4 9 7 3 4 8 1 2 6 5 5 6 2 1 7 4 9 3 8 1 7 4 3 2 9 6 5 8 4 6 2 9 3 5 7 8 1 3 4 1 2 9 8 5 6 7 8 2 5 6 7 4 3 9 1 8 5 1 2 6 7 3 9 4 Sudoku Puzzle 7 Sudoku Puzzle 8 Sudoku Puzzle 9 6 8 5 4 1 9 3 2 7 5 9 4 1 3 6 7 2 8 8 7 9 5 4 6 1 2 3 7 4 9 3 2 8 5 6 1 2 3 6 8 5 7 9 4 1 4 5 2 3 1 9 6 8 7 1 3 2 6 7 5 9 8 4 7 8 1 9 4 2 3 5 6 3 6 1 2 7 8 9 4 5 2 6 7 5 8 3 1 4 9 1 2 3 5 6 9 8 7 4 6 2 8 4 9 5 7 3 1 8 1 4 9 6 7 2 3 5 4 6 7 3 1 8 5 9 2 1 4 3 7 6 2 5 9 8 5 9 3 1 4 2 6 7 8 9 5 8 2 7 4 6 1 3 7 9 5 1 8 3 4 6 2 9 5 6 8 3 4 7 1 2 3 7 2 4 8 5 1 6 9 5 8 6 9 3 1 2 7 4 4 2 1 7 5 6 8 9 3 6 1 9 7 2 3 4 8 5 2 3 7 6 5 4 8 1 9 3 7 8 2 9 1 4 5 6 8 4 5 6 9 1 2 3 7 9 1 4 8 2 7 3 5 6
  • 55. Challenging Sudoku Puzzles - Book 4 From www.veryfreesudoku.com Sudoku Puzzle 10 Sudoku Puzzle 11 Sudoku Puzzle 12 8 5 4 1 6 3 9 7 2 7 4 6 1 5 8 3 2 9 7 9 1 5 8 6 3 4 2 9 2 7 5 4 8 6 3 1 9 1 2 3 4 7 8 5 6 6 4 2 7 1 3 8 5 9 1 6 3 2 7 9 5 4 8 5 3 8 9 6 2 1 7 4 3 8 5 9 2 4 7 6 1 2 4 8 7 1 5 3 6 9 4 7 1 5 2 6 9 3 8 2 3 8 6 5 7 9 1 4 7 3 5 9 2 6 1 8 4 8 5 3 7 9 1 4 6 2 5 1 7 4 9 2 6 3 8 6 1 9 3 8 4 2 5 7 2 6 9 8 3 4 7 1 5 9 6 4 8 3 1 2 7 5 4 7 2 6 3 1 8 9 5 3 8 4 2 7 5 6 9 1 4 2 3 1 6 9 5 8 7 5 8 6 4 9 2 7 1 3 1 2 7 6 8 9 5 4 3 1 5 9 3 7 8 4 2 6 3 9 1 8 5 7 4 2 6 6 9 5 4 1 3 2 8 7 8 7 6 2 4 5 1 9 3 Sudoku Puzzle 13 Sudoku Puzzle 14 Sudoku Puzzle 15 3 2 8 4 7 5 1 9 6 8 5 6 2 1 4 7 3 9 1 2 8 5 6 4 9 7 3 9 5 7 6 3 1 8 2 4 3 1 7 9 6 8 2 5 4 3 6 7 9 8 1 5 4 2 4 6 1 2 8 9 5 3 7 4 9 2 7 3 5 6 8 1 5 9 4 3 2 7 6 1 8 7 3 5 9 2 4 6 1 8 1 7 8 3 5 6 9 4 2 7 4 5 8 1 9 2 3 6 2 4 9 8 1 6 7 5 3 9 6 5 4 7 2 3 1 8 2 8 6 7 3 5 1 9 4 1 8 6 7 5 3 9 4 2 2 3 4 8 9 1 5 6 7 9 3 1 6 4 2 8 5 7 6 1 2 5 4 8 3 7 9 5 4 3 1 2 9 8 7 6 6 5 3 4 9 8 7 2 1 8 7 3 1 9 2 4 6 5 6 2 1 5 8 7 4 9 3 8 1 9 2 7 3 4 6 5 5 9 4 3 6 7 2 8 1 7 8 9 6 4 3 1 2 5 4 7 2 1 5 6 3 8 9 Sudoku Puzzle 16 Sudoku Puzzle 17 Sudoku Puzzle 18 9 8 1 2 7 5 4 3 6 1 2 9 8 6 7 4 3 5 4 1 2 7 8 6 3 5 9 7 4 3 9 6 8 5 2 1 6 3 5 1 4 9 2 7 8 9 6 5 2 4 3 7 8 1 6 5 2 3 1 4 7 8 9 4 8 7 3 5 2 6 9 1 8 3 7 9 5 1 4 6 2 1 3 6 4 9 7 2 5 8 5 9 1 2 3 4 8 6 7 7 5 4 3 1 8 9 2 6 4 9 5 8 2 3 6 1 7 7 4 8 6 9 5 1 2 3 1 9 8 6 2 7 5 3 4 2 7 8 1 5 6 9 4 3 2 6 3 7 8 1 9 5 4 3 2 6 5 9 4 1 7 8 5 1 9 7 8 2 3 6 4 9 7 6 4 1 3 5 8 2 2 7 3 4 6 9 8 1 5 3 2 7 6 4 1 8 9 5 8 1 2 5 7 6 3 4 9 5 4 1 8 3 2 6 9 7 8 6 4 5 3 9 1 7 2 3 5 4 9 2 8 7 1 6 6 8 9 1 7 5 2 4 3
  • 56. Challenging Sudoku Puzzles - Book 5 From www.veryfreesudoku.com Sudoku Puzzle 1 4 8 3 9 4 6 8 7 9 1 4 9 6 1 2 9 8 7 7 5 4 2 4 6 5 9 7 Sudoku Puzzle 2 7 9 2 8 6 4 8 3 9 2 8 3 1 2 3 6 4 4 7 5
  • 57. Challenging Sudoku Puzzles - Book 5 From www.veryfreesudoku.com Sudoku Puzzle 3 7 9 8 3 5 2 1 5 1 6 9 3 4 8 6 8 1 4 9 6 3 8 7 4 9 7 6 Sudoku Puzzle 4 3 1 4 3 8 3 1 7 5 3 4 9 2 6 8 4 2 9 7
  • 58. Challenging Sudoku Puzzles - Book 5 From www.veryfreesudoku.com Sudoku Puzzle 5 7 4 6 3 6 5 6 4 5 6 8 1 2 3 8 1 2 8 6 4 9 7 4 8 5 3 4 2 8 Sudoku Puzzle 6 8 1 2 6 5 4 7 3 8 6 7 2 3 4 4 2 5 7 6 3
  • 59. Challenging Sudoku Puzzles - Book 5 From www.veryfreesudoku.com Sudoku Puzzle 7 4 7 9 7 2 6 2 4 8 1 1 5 8 3 5 6 2 5 9 7 1 1 4 7 3 4 Sudoku Puzzle 8 9 4 1 8 9 5 2 7 3 6 7 1 5 8 3 8 2 8 4 7 8 3
  • 60. Challenging Sudoku Puzzles - Book 5 From www.veryfreesudoku.com Sudoku Puzzle 9 6 3 7 9 4 1 8 2 4 4 5 9 3 5 1 6 8 5 3 6 4 7 5 6 3 Sudoku Puzzle 10 3 4 5 7 7 9 2 3 4 1 4 3 6 2 8 4 5 6 7 5 8 2 9
  • 61. Challenging Sudoku Puzzles - Book 5 From www.veryfreesudoku.com Sudoku Puzzle 11 9 4 7 3 2 5 2 8 4 6 8 9 6 5 7 2 4 5 3 8 7 9 7 5 9 Sudoku Puzzle 12 1 5 2 3 1 2 8 4 8 9 6 5 9 4 6 7 2 4 5 3 6
  • 62. Challenging Sudoku Puzzles - Book 5 From www.veryfreesudoku.com Sudoku Puzzle 13 1 6 9 2 3 5 5 9 8 6 7 4 2 1 8 9 7 6 3 6 4 7 5 1 8 3 Sudoku Puzzle 14 9 6 1 4 2 7 8 5 9 7 5 2 4 1 6 9 5 1 9 4 8 3
  • 63. Challenging Sudoku Puzzles - Book 5 From www.veryfreesudoku.com Sudoku Puzzle 15 7 2 3 9 6 1 6 7 7 4 9 3 9 2 8 7 6 1 6 5 8 3 8 4 8 4 3 Sudoku Puzzle 16 3 2 5 6 1 6 8 9 1 7 3 2 4 7 4 5 6 9 8 3
  • 64. Challenging Sudoku Puzzles - Book 5 From www.veryfreesudoku.com Sudoku Puzzle 17 2 4 5 9 5 4 3 8 2 5 3 3 6 1 6 9 2 8 3 6 8 1 6 5 6 2 Sudoku Puzzle 18 9 8 3 5 1 8 4 9 1 7 9 5 7 6 2 4 5 3 6 3 7
  • 65. Challenging Sudoku Puzzles - Book 5 From www.veryfreesudoku.com Sudoku Puzzle 1 Sudoku Puzzle 2 Sudoku Puzzle 3 1 4 7 2 9 5 8 6 3 4 2 8 5 1 3 9 7 6 7 9 1 3 6 2 8 4 5 2 8 9 6 7 3 4 5 1 7 3 9 6 4 2 1 5 8 4 3 6 8 7 5 9 2 1 3 5 6 1 4 8 2 9 7 6 1 5 8 7 9 2 4 3 2 5 8 4 1 9 3 7 6 8 7 5 9 2 1 3 4 6 3 7 6 2 9 4 8 1 5 6 2 7 5 9 3 4 1 8 6 2 1 3 5 4 7 8 9 8 4 1 7 3 5 6 9 2 1 8 5 6 4 7 2 9 3 9 3 4 8 6 7 5 1 2 5 9 2 1 8 6 7 3 4 3 4 9 1 2 8 5 6 7 4 9 8 7 1 2 6 3 5 1 6 7 4 5 8 3 2 9 8 1 2 7 5 4 6 3 9 7 6 3 5 8 9 1 2 4 2 5 3 9 6 1 4 8 7 5 7 4 9 3 6 1 8 2 5 1 2 4 3 6 9 7 8 9 8 4 3 2 7 5 6 1 9 6 3 2 8 1 7 5 4 Sudoku Puzzle 4 Sudoku Puzzle 5 Sudoku Puzzle 6 1 3 8 9 5 7 2 6 4 8 2 1 3 9 6 5 4 7 5 3 4 9 2 6 1 7 8 7 5 4 8 2 6 9 3 1 5 9 4 7 1 8 6 3 2 9 8 7 3 1 5 4 6 2 2 6 9 1 4 3 5 7 8 3 7 6 2 5 4 9 1 8 2 6 1 4 7 8 9 5 3 3 8 2 6 1 9 4 5 7 7 6 3 1 4 9 2 8 5 8 1 9 5 4 7 2 3 6 9 7 1 5 3 4 8 2 6 4 5 2 6 8 3 7 9 1 3 4 5 8 6 2 7 9 1 6 4 5 2 7 8 1 9 3 1 8 9 5 7 2 4 6 3 7 2 6 1 3 9 8 4 5 5 2 6 7 8 1 3 4 9 6 4 5 8 3 7 1 2 9 1 7 3 6 8 4 5 2 9 4 1 7 3 9 2 6 8 5 2 1 8 9 6 5 3 7 4 4 5 8 2 9 3 6 1 7 8 9 3 4 6 5 7 1 2 9 3 7 4 2 1 8 5 6 6 9 2 7 5 1 3 8 4 Sudoku Puzzle 7 Sudoku Puzzle 8 Sudoku Puzzle 9 8 2 9 4 6 5 1 7 3 1 3 2 8 6 5 9 4 7 6 1 4 5 8 3 2 9 7 4 1 5 9 7 3 6 2 8 5 6 7 9 4 1 3 2 8 5 3 2 9 7 4 6 8 1 6 3 7 8 1 2 5 9 4 4 8 9 3 2 7 5 1 6 9 7 8 2 6 1 4 3 5 3 8 6 1 4 9 2 5 7 9 1 8 6 3 4 2 7 5 3 4 5 6 2 7 9 1 8 9 4 1 5 2 7 8 3 6 3 5 6 7 9 2 4 8 1 2 8 7 4 1 9 3 5 6 5 7 2 3 8 6 4 1 9 2 7 4 1 5 8 6 3 9 1 6 9 8 3 5 7 4 2 2 5 3 6 9 4 7 8 1 7 4 3 5 8 6 1 9 2 8 2 1 3 4 6 5 7 9 7 6 8 2 3 1 9 4 5 8 9 5 2 1 3 7 6 4 7 5 3 1 9 2 8 6 4 1 9 4 7 5 8 3 6 2 6 2 1 4 7 9 8 5 3 4 9 6 7 5 8 1 2 3
  • 66. Challenging Sudoku Puzzles - Book 5 From www.veryfreesudoku.com Sudoku Puzzle 10 Sudoku Puzzle 11 Sudoku Puzzle 12 2 8 6 7 1 3 4 9 5 8 9 4 6 5 1 2 3 7 1 5 8 6 2 3 4 9 7 3 4 1 2 9 5 6 8 7 1 7 3 2 8 4 5 9 6 3 7 2 1 9 4 5 6 8 7 9 5 4 6 8 3 2 1 5 2 6 3 9 7 4 8 1 6 9 4 7 8 5 2 3 1 1 3 2 8 4 7 5 6 9 2 5 9 7 4 8 1 6 3 7 2 1 4 6 8 9 5 3 8 7 9 1 5 6 2 4 3 4 8 1 9 6 3 7 5 2 4 8 5 2 3 9 1 7 6 5 6 4 9 3 2 7 1 8 6 3 7 1 2 5 8 4 9 9 3 6 5 7 1 8 4 2 4 2 7 5 8 9 1 3 6 9 6 5 4 1 2 3 7 8 2 1 9 3 4 7 6 8 5 9 1 3 6 7 4 8 5 2 3 4 2 8 7 6 9 1 5 8 6 7 9 5 2 3 1 4 6 5 8 3 2 1 9 7 4 7 1 8 5 3 9 6 2 4 5 4 3 8 1 6 7 2 9 Sudoku Puzzle 13 Sudoku Puzzle 14 Sudoku Puzzle 15 7 8 1 5 2 6 4 3 9 1 2 4 9 5 7 8 3 6 7 2 9 1 8 3 5 6 4 6 2 9 3 8 4 5 7 1 5 9 3 8 6 1 7 2 4 4 5 8 2 9 6 1 7 3 3 5 4 9 7 1 2 8 6 8 6 7 2 3 4 5 9 1 6 1 3 4 7 5 2 8 9 5 6 3 7 4 9 1 2 8 2 7 1 3 8 9 6 4 5 2 6 1 7 3 4 8 9 5 4 1 2 8 3 5 9 6 7 3 8 5 4 1 6 9 7 2 3 9 5 8 2 1 6 4 7 8 9 7 6 1 2 3 4 5 6 4 9 5 7 2 1 8 3 8 4 7 5 6 9 3 1 2 2 4 6 1 9 8 7 5 3 4 1 6 7 2 8 3 5 9 5 8 6 9 4 2 7 3 1 1 3 5 4 6 7 8 9 2 7 5 2 1 9 3 4 6 8 1 3 4 6 5 7 9 2 8 9 7 8 2 5 3 6 1 4 9 3 8 6 4 5 2 1 7 9 7 2 3 1 8 4 5 6 Sudoku Puzzle 16 Sudoku Puzzle 17 Sudoku Puzzle 18 5 1 8 7 6 4 3 9 2 2 7 8 4 5 9 1 6 3 6 9 4 8 3 1 5 2 7 9 3 7 8 2 1 4 5 6 1 5 4 3 6 2 9 8 7 5 7 1 6 4 2 3 9 8 2 4 6 9 3 5 7 8 1 3 9 6 7 8 1 2 4 5 8 3 2 5 7 9 4 1 6 6 7 3 1 4 8 9 2 5 6 1 5 9 3 7 8 2 4 7 1 8 3 2 6 9 4 5 1 5 9 2 7 3 6 4 8 4 3 9 8 2 6 5 7 1 2 6 5 4 9 8 1 7 3 4 8 2 5 9 6 1 7 3 7 8 2 1 4 5 6 3 9 9 4 3 1 5 7 6 8 2 3 9 1 4 8 2 5 6 7 5 4 7 2 9 8 3 1 6 3 2 7 9 1 5 8 6 4 8 6 4 3 5 7 2 1 9 8 6 1 5 7 3 4 9 2 1 5 6 7 8 4 2 3 9 7 2 5 6 1 9 8 3 4 9 2 3 6 1 4 7 5 8 4 8 9 2 6 3 7 5 1
  • 67. Challenging Sudoku Puzzles - Book 6 From www.veryfreesudoku.com Sudoku Puzzle 1 1 9 3 4 2 4 8 9 1 4 3 6 6 7 9 1 3 5 4 5 7 3 6 8 5 9 Sudoku Puzzle 2 3 5 2 1 4 5 7 1 2 2 4 3 7 9 4 9 8 6 6 4 3 8 1
  • 68. Challenging Sudoku Puzzles - Book 6 From www.veryfreesudoku.com Sudoku Puzzle 3 8 2 1 7 6 9 6 1 7 2 2 4 9 3 1 5 1 9 2 8 3 6 8 9 4 2 6 3 Sudoku Puzzle 4 4 6 1 2 7 1 5 2 7 4 8 4 9 5 9 9 6 8 8 3
  • 69. Challenging Sudoku Puzzles - Book 6 From www.veryfreesudoku.com Sudoku Puzzle 5 5 8 3 2 6 3 1 5 6 9 4 5 9 1 7 1 3 6 9 8 7 1 2 3 5 9 6 Sudoku Puzzle 6 1 7 5 6 1 4 8 4 7 7 1 2 5 8 9 6 5 8 5 9 3 7
  • 70. Challenging Sudoku Puzzles - Book 6 From www.veryfreesudoku.com Sudoku Puzzle 7 8 2 6 8 4 7 5 9 2 6 2 4 9 1 5 5 7 3 9 6 3 8 2 4 3 9 8 Sudoku Puzzle 8 8 2 5 3 1 4 2 7 3 6 1 3 2 3 8 5 7 7 4 6 1 2
  • 71. Challenging Sudoku Puzzles - Book 6 From www.veryfreesudoku.com Sudoku Puzzle 9 8 3 5 4 7 6 2 4 7 8 2 7 5 6 3 2 2 8 7 8 5 6 9 3 5 4 Sudoku Puzzle 10 4 1 3 2 8 6 1 8 9 7 4 3 6 2 1 9 6 3 5 4 8 3
  • 72. Challenging Sudoku Puzzles - Book 6 From www.veryfreesudoku.com Sudoku Puzzle 11 7 1 5 3 8 2 1 5 3 5 1 4 1 9 2 5 8 7 5 8 2 4 5 9 9 6 4 7 3 Sudoku Puzzle 12 7 3 8 9 8 9 4 6 5 7 2 1 7 4 6 5 8 1 2 3 4
  • 73. Challenging Sudoku Puzzles - Book 6 From www.veryfreesudoku.com Sudoku Puzzle 13 4 3 7 8 1 2 5 6 7 9 5 3 7 1 8 8 9 6 7 5 2 6 4 3 8 9 2 Sudoku Puzzle 14 1 7 1 6 9 5 4 6 7 3 8 5 2 2 9 7 1 5 1
  • 74. Challenging Sudoku Puzzles - Book 6 From www.veryfreesudoku.com Sudoku Puzzle 15 6 5 4 3 4 5 9 7 1 6 2 4 9 2 8 1 3 8 3 2 9 6 2 8 7 9 1 3 8 Sudoku Puzzle 16 7 2 3 4 1 2 5 4 8 1 5 8 9 7 7 3 6 4 1 2
  • 75. Challenging Sudoku Puzzles - Book 6 From www.veryfreesudoku.com Sudoku Puzzle 17 6 3 1 8 4 3 4 7 1 4 2 8 5 6 3 1 4 5 7 1 3 6 7 2 5 1 3 8 Sudoku Puzzle 18 3 6 5 1 4 6 3 2 2 6 9 3 7 3 8 9 2 4 7 1
  • 76. Challenging Sudoku Puzzles - Book 6 From www.veryfreesudoku.com Sudoku Puzzle 1 Sudoku Puzzle 2 Sudoku Puzzle 3 7 6 4 2 3 1 5 9 8 2 7 5 9 1 3 6 4 8 6 8 5 4 1 3 9 2 7 5 1 8 9 7 6 3 2 4 4 8 3 7 6 5 2 1 9 4 1 2 5 9 7 6 8 3 9 2 3 8 5 4 1 6 7 6 1 9 2 4 8 3 5 7 9 7 3 8 6 2 5 4 1 2 5 7 6 4 8 9 1 3 3 5 7 6 8 9 1 2 4 3 5 1 6 8 9 4 7 2 4 8 9 3 1 2 7 5 6 8 2 4 3 7 1 9 6 5 8 6 7 2 4 5 1 3 9 1 3 6 5 9 7 8 4 2 1 9 6 5 2 4 7 8 3 2 4 9 3 7 1 8 6 5 6 9 2 1 8 3 4 7 5 7 4 8 1 9 2 5 3 6 1 3 4 9 2 6 7 5 8 8 4 5 7 2 9 6 3 1 9 3 1 8 5 6 4 7 2 7 2 8 1 5 4 3 9 6 3 7 1 4 6 5 2 8 9 5 6 2 4 3 7 8 9 1 5 9 6 7 3 8 2 1 4 Sudoku Puzzle 4 Sudoku Puzzle 5 Sudoku Puzzle 6 5 9 8 1 4 2 7 6 3 9 7 1 5 2 8 6 4 3 8 5 2 3 4 9 1 7 6 1 2 7 6 8 3 5 9 4 8 2 5 6 4 3 1 9 7 3 1 4 7 6 2 5 8 9 3 4 6 7 9 5 1 2 8 6 3 4 1 7 9 8 2 5 6 9 7 5 8 1 3 4 2 7 1 4 5 6 9 3 8 2 3 8 6 9 1 2 5 7 4 1 2 8 6 9 3 4 5 7 6 8 9 3 2 7 4 5 1 5 4 2 8 3 7 9 1 6 4 7 9 1 2 5 8 6 3 2 3 5 8 1 4 6 7 9 1 9 7 4 5 6 3 8 2 5 3 6 8 7 4 2 9 1 4 5 3 9 7 8 2 1 6 4 1 3 7 8 5 2 6 9 9 6 1 2 5 8 7 3 4 9 7 1 2 3 6 8 4 5 2 6 8 3 9 4 7 5 1 2 4 5 9 3 7 6 1 8 8 6 2 4 5 1 9 3 7 7 5 9 2 6 1 4 3 8 7 8 3 4 1 6 9 2 5 Sudoku Puzzle 7 Sudoku Puzzle 8 Sudoku Puzzle 9 5 4 1 8 2 3 6 9 7 1 2 7 4 9 8 5 6 3 2 7 6 4 1 9 8 3 5 8 6 2 9 4 7 1 5 3 3 6 4 1 7 5 8 9 2 8 4 3 5 2 7 9 6 1 3 7 9 5 1 6 4 2 8 8 5 9 3 2 6 1 7 4 5 1 9 3 8 6 4 7 2 6 2 4 7 3 9 5 8 1 4 9 2 5 1 7 3 8 6 6 9 5 2 3 4 1 8 7 7 9 8 1 5 4 2 3 6 7 1 8 6 4 3 9 2 5 1 8 2 7 9 5 6 4 3 1 5 3 2 6 8 9 7 4 5 3 6 2 8 9 7 4 1 4 3 7 1 6 8 2 5 9 2 3 5 4 7 1 8 6 9 9 4 3 8 6 1 2 5 7 3 6 4 9 5 2 7 1 8 9 1 6 3 8 5 7 4 2 2 8 5 7 3 4 6 1 9 7 2 1 8 4 3 5 9 6 4 8 7 6 9 2 3 1 5 6 7 1 9 5 2 4 3 8 9 5 8 6 7 1 3 2 4