Printable Hard Sudoku

Set 1mqgy7w. 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 9
9 6 2
7 2 4 3
3 8
5 1 2 9
3 1 2 7
5 4 7
6 7 1
1 4 2 6
Hard #2
7 8 3 2
5 9 3
7 6 5
3 2 9 5
1 4 3 6
1 6
5 3 1
4 1 2 8
6 7
Hard #3
2 6 9 8
8 3 5 7 4
4 9 1
1 8 9 3
5 8 6
3 8
7 5 4 9 8
2 6 7
Hard #4
3 8 6
5
7 2 3 9 8
8 4 6 5 7 1
6 4 3
9
1 6 5 2
5 4 7 6
9 3
Hard #5
9 5 3 6 4
8 5 3
3 4 2
7 2 4 9
6 4 9 2 5
5 3
2 1 6
7
8 6 5
Hard #6
1 5 2
8 7 5 2 6
8 5 6
3 1 9
5 3
9 2 4 5
2 9 7 8
6 1 2
1 9
Hard #7
2 4 9 7
8 5 1 6 4
9
1 7
7 3 2
1 4 7 8
7
2 1 9 5
7 2 4 3 1
Hard #8
9 3 1
2 8 3
3 5 7
7 9
1 3 5 6
8 7 2
4 6 2 9
6
5 1 8 3 9 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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