Printable Hard Sudoku

Set 89omek. 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
7 4 6
1 9 2 4 3
1 9 7
4 8 2
3 5 9 8
7
7 3 4 6 8 2
4 2 6
Hard #2
6
9 4 7
8 2
4 7 9 2 6 1 5
5 3 4
8 5 4 2
8 9 6 3
4
3 1 4 9
Hard #3
7 6
3 5 6 1 7
1 7 2 8 6
4 1 3
8 4
7 2 3 4
4 5 2 8
1
2 4 3
Hard #4
9 6 2 3
8 7 4
3 4 7
2 7
1 6 2
7 4 5
1 9 6
9 6 7 1
4 2 3 9
Hard #5
6 9 3
9 5 4 8
7 9
5 8 6
9 6 8 1 4
4 7 9
9 4 7
4 2 1 3
8 5
Hard #6
1 6 9
2 1 6 4 7
2
3 4 9 1 7
8 5 9 4
1 7 3
3 5
7 8 2 6
4 8
Hard #7
2
7 9 4 1 8
1 3 2 7
9 6
5 6 2 7
4 9 3 2
1 4 8
8 3 6
4 7 9
Hard #8
4 7 6 5
7 4
9 4 1 2
3 5 1 2
6 2 4
2 4 3 6 8
5 8 7
8 5
1 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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