Printable Hard Sudoku

Set 11g2c61. 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 8 4
3 2 1
4 1 6 3 2
5 9 3
6 7 1 4
3 9 6 5
3 7 1 8
1 8
2
Hard #2
1 9 5 7 6
2 8 7
7 3 6 1 5
9
5 2 3
4 7 1 2
4 1
6 7 9 3
4 8
Hard #3
9 6 8 2 7
7 6 2 3 1
6 5
3 9 5
1 6
8 4 7
2 8 3 9
1 3
9 1 2
Hard #4
5 2 4 3
1 2 6 4
3 9 8 5
4 2
2 3 6
8 1 6
9 3 5
6 5 9
6 7 3
Hard #5
9
6 1 3 2
3 2 1 6
2 4 3 6 9
4 1
5 2 1 7
1 8 4 5
5 6 9
5 3
Hard #6
7 6 9
2 1 6 5 4
3 6
9
7 8 2
5 3 9 7 4
9 1 8 2
6 8 7
7 4 6
Hard #7
1 5
5 6 3 8
3 7 9 6
3 5 1
2 5 8
6 4 8 9
6 8
9 7 1 6 2
9 1
Hard #8
3 6 9 5
6 3
1
1
2 4 3 5
8 5 9 1 7
9 4 1
2 1 6 7 4
4 2 6 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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