Printable Hard Sudoku

Set 12gfs6r. 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 5
4
8 7 3 9
3 7 2 5 4
4 3 2
6 2 7
1 4 8 6
2 7 4 1 8
3
Hard #2
9 3 5 2 8
5 4 3
1 5 7
7 8 1 2 5
6 4
2
9 2 1 8
9
8 6 5 7 4
Hard #3
7 8 6
5
4 8 9 2
8 5
7 5 9 1
6 2 7 1 8
5 4 9
2 7 9
3 7 5 1
Hard #4
4 9 8 5 1 2
8 7 1 4
5 7
6 8
3 1 2
7 6 8 4
5 3 8
6 2 8 3 5
Hard #5
4 2 9
7 5 8 6
2 6 9 3
3
5 9 8 7 1
9 7 3 5
8 4 3
1 5 8
1 6
Hard #6
7 9
3 1
9 3 8
8 2 9 5 1 7
5 8 2
6 9
6 1 8 9
7 1 4 8 2
2 4
Hard #7
1 3 5 8
6 7 8 1 2
5 6
8 2
3 6 5
1 6 7
9
2 5 4 8 7
7 4 9 8
Hard #8
8 6 4 7
2 4 7 5
1 9
3 6
6 9 1 3
8 2 1
5 4 9 2
3 8 2
7 8 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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