Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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