Printable Hard Sudoku

Set 122mf67. 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
9 5 2
4 5 8 2
3 6 4 5
7 8 5
6 1 7 9 8
4 2 6
9 6 2
7 9
4 1
Hard #2
6 5 3 4
6 7 5
1 5 8 9
1 4 9
8 6 7 3
5
8 4 3 6 7
9 6 2 4
7
Hard #3
5 8 7 2 3
8 5 9
6 9 8
9 4
1 9 8 2
7 4 1
7 4 6 8
3
6 8 2 3
Hard #4
2 7 8
9 5 2
5 3 6
4 2
1 9 7 5
9 7 1 3
4 7
3 4 6 8
6 8 9 5
Hard #5
7 8 2
4 2
8 9 6 1
6 4 1 2
5 7 4
9 5
6 9
8 7 5 3
2 6 1 7 8
Hard #6
9 8 2
1 5 4 7 9
4 3
2 9
2 1 8
9 5 4 6
8 4 6
7 9 5 8
5 3 7
Hard #7
2 1 6
8 7 9 1
1 2 6
1 9 7 3
5 3 4
6 8 7
7 1 8
8 9 7
1 7 3
Hard #8
8 9
8 7 9 6
1 2
4 6 3 5
1 9
2 5 1 4
4 3 5 9 2
3 5 7 4
8 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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