Printable Hard Sudoku

Set g99vox. 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
7 3 1
3 5
8 6 3
6 3 2 7 1
5 1 4
1 6 5 3
4 5 1 7
4 7 9 6
8
Hard #2
3 2 7
4 6 2 5
6 5 8
6 8 9
9 5 1
5 4 7
4 3
5 1 8 2
2 1 5 7
Hard #3
3
4 6 8
1 4 7
3 4 1 9 5
8 5 1 2
5 8
3 1 2
8 9 3 7
2 1 7 6
Hard #4
5 8 4 6
3
4 9 5
1 3 7 5 8
5 6 4
6 7 9
3 5 2 8
4 2
8 5 3 7
Hard #5
9 5 6 1
7 1 8 2 9
9 8
6
1 4 6
2 7
2 6 3 4 9
7 5 3 2
3 2 7
Hard #6
3 9 8 2
1 3 5
1 7 2 5 6
8 6
9 4
6 5 3 1 2
6 5 4 7
8 2
3 4
Hard #7
9 5
4 6 3
3
3 8 2 1
6 7 5 3 4
4 9 2
1 8 7 9 6
1 2
9 3 4 5
Hard #8
5 6 1 9
3 2 4
2 8 3
1 9 6 2
2 5
3 4
8 2 7
5 3 9
4 3 5 8 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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