Printable Hard Sudoku

Set zwpb2f. 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 7 6
3 2 8 9
6 7 2 4 8
5 6 4
9 4 3 5 8
8 6 2 1
3 2 9
4
7
Hard #2
7 3 5
9 8 2 6
4 7 9
2 1 4
4 3 1
5 3
1 6 9 4 2
7 4 1 3
2 8
Hard #3
8 4
4 5 1
6
3 8 1 4 2
7 9
1 2 5 8
6 1 2 3 5
1 9 6
3 4 8 1
Hard #4
3 9 1
7 5
7 6 4 5
3 8 2 6
4 9 1
2 8
9 7 4 3 8 5 1
4
5 3 6
Hard #5
4 2 7
8 6 3
2 6 5
4 9
6 7 4 2
3 2 5 8
1 7 2 3
7 5 4 1 8
5
Hard #6
1 2 3
4 8
1 9 4 5 8
6 3 9
8 5 4 3 2
2 7
5 1
5 8 7 4
2 8 6
Hard #7
8
9 3 1
5 6 7 1
8 1 9
7 3 5 6 4 1
3 2
1 2 6 5 7
4 3 9
2 1
Hard #8
2 8 6
5 8 3
3 9 5
7 4 9
8 6 7
6 1 7 9 4
2 6 9
4 5 1 2
6 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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