Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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