Printable Hard Sudoku

Set m2pwyk. 8 puzzles with an answer key, ready to print.

Hard puzzles start with about 29 givens and need real techniques: pointing pairs, naked pairs and hidden pairs. Paper is a great way to practice them, because you have to keep your own notes honest.

Each free PDF has 8 puzzles, four to a page on US Letter paper, plus an answer key with every solution. Every puzzle has exactly one solution. A new set appears here every day, or you can grab a different set any time.

Puzzles in this set

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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