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Sudoku: Hard 9 by 9
4 puzzles, one per page, with the answers at the end. Fill every row, column and box with each number once.
Sudoku 1: Hard 9 by 9
7
5
1
4
5
2
6
4
2
9
9
7
1
1
9
4
6
9
5
4
6
3
3
8
2
7
Sudoku 2: Hard 9 by 9
2
9
9
7
6
4
1
3
8
1
2
2
1
9
3
5
4
7
9
4
1
3
5
2
6
7
Sudoku 3: Hard 9 by 9
6
7
5
2
4
8
5
7
6
9
3
7
4
6
1
9
5
9
6
3
2
8
7
6
1
7
Sudoku 4: Hard 9 by 9
6
7
8
3
1
9
5
8
9
8
7
6
8
3
7
2
2
1
2
4
9
1
7
5
7
4
Answers
Sudoku 1
2
6
3
8
4
7
9
5
1
7
9
5
2
6
1
3
8
4
8
1
4
5
3
9
2
7
6
5
4
6
1
2
3
7
9
8
9
8
2
6
7
4
1
3
5
3
7
1
9
5
8
6
4
2
4
5
7
3
1
6
8
2
9
1
2
9
7
8
5
4
6
3
6
3
8
4
9
2
5
1
7
Sudoku 2
1
4
6
8
2
9
3
7
5
9
7
3
1
4
5
6
8
2
8
5
2
6
7
3
4
1
9
3
6
7
4
5
2
8
9
1
4
9
5
7
1
8
2
3
6
2
1
8
9
3
6
7
5
4
7
2
9
5
8
4
1
6
3
5
3
1
2
6
7
9
4
8
6
8
4
3
9
1
5
2
7
Sudoku 3
6
2
3
1
7
4
5
9
8
1
9
7
5
2
8
6
4
3
8
5
4
3
9
6
1
2
7
2
8
6
7
5
1
9
3
4
7
3
5
4
6
9
2
8
1
4
1
9
8
3
2
7
6
5
9
7
1
6
4
3
8
5
2
5
4
2
9
8
7
3
1
6
3
6
8
2
1
5
4
7
9
Sudoku 4
6
5
2
7
4
8
1
9
3
3
1
7
6
9
5
2
4
8
4
9
8
3
1
2
5
6
7
1
2
6
8
5
7
9
3
4
8
3
5
9
6
4
7
2
1
7
4
9
2
3
1
6
8
5
2
6
1
5
8
3
4
7
9
9
8
4
1
7
6
3
5
2
5
7
3
4
2
9
8
1
6