Printable Hard Sudoku

Set 1qv2nkb. 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 7
2 3
7 8 3 5 1
3 2 7 5
7 4 5 1
4 3
6 8 1 4
5 7 6 9
1 9
Hard #2
7 3 4 9 8
4
7 8 1
3 5
8 1 5 7
7 2 3 8 4
6 4 8 2
2 9 7
9 5
Hard #3
2 3 7 1
6 3 5 8
9 4 2
2 5 9 7 4
3 6 1
8 1 7
8 2
5 9 6 8
2
Hard #4
8 7 9
3 4 6 8
5 6 1 7
9 8 4 5
5 6 8 2
7 5
7
4 6 3 9
2 4 8
Hard #5
6 2 7 4
1 7 6 2
4 8 9
8 7 2
6 5 2 4 9 1 7
9 4 5
4 6 1 3
3
Hard #6
5 6 4 9
3 6 9 4
1
2 3
9 1 2
1 6 4
8 5 9
6 4 8
5 2 1 6 7 3
Hard #7
2 4 5 9
4
9 6 8
5 7 9
3 6
2 9 1 3
3 1 7
4 3 9 6 7 2
7 3 8
Hard #8
4 8 5
1 3 8
9 8 4
3 6
5 3 4 1
8 2 3 9
3 9 1
5 9 8
7 4 5 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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