Printable Hard Sudoku

Set 19p95vm. 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 2 3
3 4 9 6
8 3 5
3 5 4 2
1 2 7 6
6 1 3
6 9 8
1 8 5 4
9
Hard #2
1 7 8
5 3
6 2 5 4
4 1 8 6
2 5 7
7 6 3 5 2
1 5
5 4 2 9
2 6
Hard #3
1 5 3 7
6 3 9
7 9 4 1
4
7 3 4 8 5
8 6 7
6 2 7
3 2
2 5 7 8
Hard #4
6 4 2
9 8 4
5 9 3 4
7 1 4
8 6 2
1 2 5 8
2 5 9 1
3
9 4 6 5
Hard #5
6 8 1 2 4
9 4 3
1 7
4 6 5 9
7 2
5 6 2 7 3
4 7 5
2 3 4
5 6
Hard #6
9 7 4
8 5
3 6 1 8
2 9 5 6
6 5 1
4 1 5 2
5 8 9 3 1
2 9
3 7
Hard #7
6
4 3 1 2
4 9 5 7 6
8 5 2 3 1
2 8 1 5
9 6
1 8 9 7
5 9
3 8
Hard #8
1 4 6
6 7 9 5
4 3 6 7 5
8 1 7 9
2
8 4 6 5
7
3 4 9 8
5 1 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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