Printable Hard Sudoku

Set k2m0ny. 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
7 9
2 4
2 5 6
4 3 2 8
3 9 5 2 6
8 6
7 4 3 2
1 3 4
1 6 9 7
Hard #2
2
7 1
3
4 6 8
6 2 7 8 5 1
9 8 5 3 1
1 3 4 5 9
8 5 6
2 8 3
Hard #3
8
6 2
7 3 4
4 5 6 9
8 2 5 1
9 8 4
4 5 2
6 4 9 3 2
9 6 7 4
Hard #4
7 1 9 5 8 6
9 6 3 1
5 9
3 8 7 1 9
2 5 4 6
9 5
7
6 5 4 8 1
Hard #5
2 7 5
4 9
4 3 2
7 6 2
1 5 8 3
4 8 9 7
3 6 1 5 4
8 2
6 8 5
Hard #6
6 1 9 5
9 8 2 6
8
1 6 5 3 9
4
6 7
8 7 2 3
5 3 8 9 1
4 3 8
Hard #7
3 9 6
3 8 2
9 8 6 3
3 6 5
4 1 7
9 8 6
1 6 2 7
7 6 2
7 5 4
Hard #8
2 7
6 1 3 4 5
5 4 8 1
1 6
8 6 3 9 1
8 5
7 9
9 8 2
1 7 4 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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