Printable Hard Sudoku

Set la5puy. 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
8 6 4
5 7 2
2 6 9 7 3
8 2 1
9 6 2
6 7
3 9 5
9 8 3 1
5 8 4
Hard #2
2 7 1
5 3 7 8
4 2 7 5
5 9 3 7
7 2
9 8 6 4
8 4 1
5
6 7 9 2
Hard #3
2 1 6 5
4 8 3 1
8 3 2
9 4 6
6 1 2 4
3 8 5 9
9 3 2 5 1
8 7
Hard #4
5 7 4 3 2
3 1
5 9 6 8
2 4 1 5
9 7
6 7
6 9 4
1 3 8 2 7
7 9
Hard #5
2 1 5 9
8 9 6 4 1
3 7
6 2 1 5
8 5
5 6
7 4
3 2
6 4 3 2 8 9
Hard #6
6 1
3 7 2 9
3 4
2 6 5 4
5 7 4 9 6
5 2
4 7 9 8
2 9 1 5
1 7
Hard #7
6 7 3 1
4 6 5 9
9 1 2 4
8 1 5 4
7 6 5
3 9
5 7
9 4 6
2 7 1
Hard #8
5 2 1
3 2 1 4
4 9
4 8 2
2 6 7 8
7 6
6 8 1 3
1 8 5 3
1 2 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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