Printable Hard Sudoku

Set m0dawm. 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
6 3 2
8 4 6 1
5 3 6
1
9 2 7 6
6 7 2
3 1 5
4 5 1 7
7 8 9 1
Hard #2
2 4
9 1 4 7 5
7 6
8 4
5 7 9 1 8
1 6 2 7 3
2 3
5 1
9 1 2 7
Hard #3
7 5
7 3 6
8 1 4
2 3 7 1 4 5
6 2 5 3
6 8
9 6 2
2
1 4 5 3 9
Hard #4
3 9 7
5 9 6
2 6 8
3 2 6 7 5
4
8 4 3 1
6 9
4 6 2 5 1
3 7 8
Hard #5
3 6 9 2 5
4 8 6
9 5 8 3
1 9
4 8 5 7 2 1
7
1 7
2 4 6
5 7 4
Hard #6
9 5 7 3
6 2
5 1
6 1
3 5 2 4 1
3 5 8 6
6 7
7 8 9
5 6 1 3 8
Hard #7
6 2 4
1 5 8 6
2 6
6 1 5
9 5
5 8 4 2 7 3
2 3
1 9 3
7 4 5 2
Hard #8
7 5 4
1 8
9 6
8 4 1 9
2 7
1 6 5 2 7
7
5 2 9 8 6
7 1 5 9 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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