Printable Hard Sudoku

Set rz56bw. 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
5 7 2 3
2 4 8
9 6
9 3
9 8 4 7 5
3 5
9 5 3 4 6
8 5
7 6 4 9
Hard #2
4 8
8 6 2
2 7 8 9 4 5
6 8 1
4 6 7 5
9 5
9 5 3 2
7
8 3 5 6
Hard #3
6 2 3
6 1 2 5
7
8 4
5 2 1
9 7
2 1 5 4 9
8 4 5
9 5 8 6 1 3
Hard #4
2 1
5 9 3
7 2 5 9 3 4
8 4
7 3 8 1
2 4 6
7 6 4 2
8 7
9 5 1
Hard #5
3 9 4 5
9 5 6
3 7 9
8 9 3
7 1
9 8 2
1 5 4 2 9
5 9 6 4
2 8
Hard #6
5 1 6
1 7 4 3
2 9 3
2
9 1 4 5
9 4 5 1 3
4 6
7
3 7 2 5 1 8
Hard #7
9 6 8 5
1 8 5
5 7 3 8
3 9 4 8 1
6 1 9 3 4
7 1
6 2
4 5 9
3
Hard #8
2 7 4 1
3 5
9 8 5 3
5 3 1 6 7
6 7 2 3
9 4
4 9
1 5 7 4 2
9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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