Printable Hard Sudoku

Set qrcm7t. 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
6 3 5 8
6 7 4
9 7 1
4 5 1 8
6 9 2
3 9 2
3 9 2
5 1 3
8 2 9
Hard #2
2 4 9
4 8 7 1
1 7
9 6 3 4
3 1 7
7 3 6 9 2
8 5 4
5 2 9
1 7
Hard #3
8 2 6 1
5
7 1 8
6 5 2
6 7 5 8
3 9
9 2 4 3
8 5 9 6
4 2 7 9
Hard #4
2 8 3 4
3 7 6 8
7 9 5
4 1 5 8 2
9 7
2 8 9 6 4
3 6 4
5 1 7
Hard #5
2 9 5 3
4 5 9 6
3 6 9 4
7 2
8
8 1 4 7 3
3 8
1 4 6
3 1 2 9
Hard #6
2 9 8 6
6 7 4
5 3 6
8 9
4 8 7 1 2 5
5 8 1
5 9 1 3
8
6 7 4
Hard #7
7 6 5 1
1 9 2
2 6 5 7
3 9 4 6
6
3 2 9
8 3 7
7 4
5 2 1 3 8
Hard #8
6 2 1
9 8 3 1 5
3
9 6
7 3 8 9 4
1 7 8
6 8 7
1 5 7
2 6 5 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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