Printable Hard Sudoku

Set x1h9fz. 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 7 2 5
5
8 7 6
9 1 4 3
2 3 7 4
8 5 4
7 1 6 9
6 2 1
6 8 3
Hard #2
6 2
5 4 9 3 8
4
2 5 4 6
8 5 7 3
7 2 9
7 4
9 2 1
1 3 8 6 5
Hard #3
1 3 8
8 6 7
2 4 5 7
4 8 6
5 2
5 9 1 4 3
2 3 6 1
6 1 4 3
6
Hard #4
6 9
9 4 1
4 5 3
3 4 2 7
1 9
2 4 8 6 5
4 7
8 9 5 4 6
1 2 5
Hard #5
1 7 3
2 8 5
2 3 4
4 2 8 6
5 9
6 3 8
9 1
7 8 9 2
5 6 1 4 3
Hard #6
7 3 9 4
4 5 2
9 6 3 4 7
5 8 9 1 6
4 1 7 5
6
2 9 8
3 7 6
4
Hard #7
2 3 7 5 4 9
2 4 1
8 9 1 3
4 5 2
2 6 5 1
7 9 8
3 5
1 9 7
4
Hard #8
8 5 3
2 7 4
4 7 1 9 8
2 3 9 5
9 1 8
8 9
5 7 6
1 4 6 8 7
9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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