Printable Hard Sudoku

Set 1m92u9z. 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
3 9 6
5
7 8 5 1
6 2 4 3 1 7 9
5 4 2 3
7 9 6 5 2 8
8 7
3 4
Hard #2
3 1 4
6 2 4
5 3 9
1 5 9
6 1
3 4 7
6 1 3 7 2
2 9 6 1
5 3 4
Hard #3
6 5
9 2
7 5 9 1 6
3 6
9 7
7 3 8 1 9
2 4 6 1 8
5 2 3
8 7 2
Hard #4
9
5 8 1
4 6 9 2 5
3 7 8 9 5 6
6 2 7 4
2 4 1
8 5 3
9 1 5 2
Hard #5
4 5 2
9 1 4
3 8 5
4 8 7
3 1 6 2
2 7 8 9
5 2 3 1
4 5
4 9 1
Hard #6
7 4 8 2
9 1 6 8
2 1 5
3 9 4 1
5 3
2 4 9
1 9 6
5 2 9
3 8 7
Hard #7
8
6 9 2 7 5 3
1 5 9 6 7
9 7
3 5
3 4 1 2
4 6 9
6 9 5 4
9 2
Hard #8
4 3 2
3 6 8 1
8 6 1
6 9
5 9 2 1
2 7 5 3
4 9 1 2
5 6 2
7 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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