Printable Hard Sudoku

Set 13mv7sy. 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
9 1 4
3 6 9
8 3 2 1
3 1 5 8
4 5
2 3 1 8
2 8 7
8 5 2 6 9
6
Hard #2
5 4 7
9 4 3 8
8 7 4 6
8 5 2
5 1 6 4
4 7 8
9 3
8 1 2
2 6 1
Hard #3
6 4
2 9 5
2 3
9 4 8 3 6 2
5 9 8 4
5 3 1
1 7
6 2 4 3
6 5 8
Hard #4
9 2 8
6 9 8 1
3 1 4
2 4 6 3
7 9 5 3
5 2 1
1 6 2
1
4 5 8 7
Hard #5
9 5 6
3 2 1 5
2 9 8 4
2 9 6
8 4
8 9 4
4 8 2
9 6 5 7
7 8 4
Hard #6
9 3 1
1 9 8
5 1 6
8 5 3 9
4 9 7
6 9 2 8 3 5
6 7
2 9
3 4 1
Hard #7
8 6 1 3 9 2
3 6
2 8
9 5 8
2 4 7
8 6 7 9
1 4 6
3 6
7 2 3 4
Hard #8
3 8 5
2
1 6 7 5 8
7 8 5 4 9
3 8 1
6 7 5
8 3 1 4
9 6 8 2 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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