Printable Hard Sudoku

Set 1qrgs8. 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
1 3 8
6 9 2
2 4 3 7 9
3 8
2 9 6 5
4 6 9
7 4
4 1 3
5 3 4 1
Hard #2
5 6 7 8
7 1 2 6
4 7 3
7 3 1 5
9 6 4
8 7
1 2 3
6 1 8 4 2
7
Hard #3
8 3 1
7 5
5 4 9 7 6 2
5 6 1 2 3
7 9 4 8
1
4 1 7 6
2 3 8 4
Hard #4
1 8 4 2
9 2 5 7
3 5 9 7
6 4 3 9
7 1 6 8
5 2
8 9 5 1 6
7 3
Hard #5
6
2 5 1
1 4 3 5
3 7 8
8 6 2 3 5 4
2 1 4 6
3 7 1
7 4 9
4 8
Hard #6
5 7 9
5 4 1
2 8 3 5
2 9 5 8 3
8 6
1 6
3 4
9 4 1
6 7 9 1 2
Hard #7
5 1
7 2 9
3 7
9 6 1 2
1 4 2 7 3
2 3 8
4 6 5
2 8 9 7 6
6 4
Hard #8
7 6
5 3 4
2 9 1 6 7
2 6 4 8 1
8 5
1
4 5 3
9 7 1 2
3 9 1 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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