Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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