Printable Hard Sudoku

Set mwz91y. 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 5 4 2 3
3 7 5 8
4
2 6
6 9 8 5
9 1
6 9 7 1
5 7 2
2 1 3 6
Hard #2
8 1 4
2 8 6 3
5 9 3 1
3 6 8 7
4 8 3 9
9 4 7
8 7 5
1 5
9 7
Hard #3
6
8 4 9
6 1 2 3
8 2 7 3
2 1 8 4
4 3 8 5 2
1 3
6 5 1
8 4 6
Hard #4
8 6 2 5 1
2 1 9
8 3
5 4 7 1 6
9 1 7
6 2 9
4 3 6
6 7 8
7 5
Hard #5
4 1 8 2
8 1 2 6
6 5 8
3 8
6 3 4
7 5 9 4
9 2
3 5 4 7 8
8 2
Hard #6
3 6
6 4
6 9
5 1 2 4 9
4 7 2 1
5 3
2 5 8 9
9 1 2
3 5 6 2 1
Hard #7
5 3 7
7 3 4 9 2
2 6
1 8 4 2
8 6
3 7 9 1 5
8 1 6
3 9
1 3 5
Hard #8
8 4
4 3
3 5 1 2
2 3 4
6 2 1 9
5 9 1 2
1 5 4 3
5 6 7
4 8 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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