Printable Hard Sudoku

Set hf119m. 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
5
3 1 6
6 1 4 8
2 4 3 1 7
7 9 2 4
1 8 6
3 4 9
9 6 5 2
8 4
Hard #2
3 2 1
6 9 1
8 7 6 5
2 1 9
2 1 6
4 9
5 2 8 3
9 4 7 5
3 1 4
Hard #3
9 6 3 8 1
9 5 3
1 2 8 7
5 4 9
7 3 5 9
1 4
5 9 1 8
3 2
8 7
Hard #4
2 8 6 4
2 7 6
8 6 5
2 9
1 3 2 8 7
8 7
8 5 1
4 9 5
5 8 3 9
Hard #5
3 2 6 8 5
5 7
9
3 7 2
7 2 6 4
6 7 3
6 1 5 3 2 4
2 8 6
4 5
Hard #6
4 7 1 3
8 5
6 9
3 1 2 7 6
5 6 3
9 7 3 5
3
7 6 8
8 9 5 1 6
Hard #7
1 9 3
2 5 6
6 3 9 8
1 7 4
4 7
5 4 2 6
2 4 9
4 3
7 9 3 5 1
Hard #8
6 2
3 1
4 2 9
6 2 4 8 7
5 2
7 8 9 6
3 9 8 5 6
5 1
8 4 3 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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