Printable Hard Sudoku

Set 15vqtxv. 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
4 8
7 6 8 2
4 8 3 6 1 7
6 5 3
7 5 6
2 1
8 5 7
3 9 8
2 7 1
Hard #2
9 7 5 8 1
6 4 1 5
5 7
2 9 4
8 3 7 6
1 6 4
9 3 7 8
6 5
4 6
Hard #3
2 6 9 7
9 8 2 5
5 7
8 4 1 5 3
5 6 9
2 9
6 4 8
6 3 8 4
1 6
Hard #4
6 5 8
3 8 4 2
8 2 3 9 1
7 1 2 3
9 8
5 9 4
8 7 2 3 9
7 1 2
Hard #5
2 6 7 4
3 7 1 9
4 1 8 5 3
8 5
9 3 7 2
5 9
5 9
2 4 8 3
6 8
Hard #6
2 5
2 5 1 4 3 6
8 9
7 4
8 7 9 1 3
1 6 3 8
8 2 6
5 3 6
9 5
Hard #7
3 9 2 5
9 1 3 2
8 4 5
8 9 3
3 2
6 8 9 4
1 6 2 8 3 7
7 1
5
Hard #8
8 5 9 1
5 4 2
7
8 1 4 2 7
3 2 4 6 8
2 9 3
6 2 1 3 7
8 6 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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