Printable Hard Sudoku

Set x2r6cz. 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
1 3 7
8 4 1
6 5 9
2 6 7 9
3 5 2 4
1 8 5
1 3
8 9 7
3 1 6 2
Hard #2
1 8 7
6 3 2 8
5 2 6
7 2 1
1 3
3 5 7 9 4
7 6
8 5 2 9
6 5 7
Hard #3
8 1 4 5 7
3 5 1 8
7 3 5 1
1 4 9 2
9 5
3 7 6
4
5 7 4
8 6 5
Hard #4
3 6 4 2 7
8 5 7
7 1 6 2
5
2 1 8 3
4 7 6 3 2
6
5 7
2 8 3 4
Hard #5
7 9 4
9 6 4 2 8
2 3 6 5
9 6
6 1 2
2 7 1 8 4
6 1 5
9 7
5 3
Hard #6
9 8 7 6 4 2
2 8
5 4 2 3
5 6 4
4 6 8
1 7 2
2 4 5
3 1
1 6 7
Hard #7
8 3 4 5
5 8 1 6
1 4
8
1 9 3
6 2 8
2 7 8 6 1
9 4 3 2
5 4 2
Hard #8
8 7 2 9
1 6
6 2 5 8 1
7 8 3
8 4 2
4 3 9
2 3 7
4 2 7
6 9 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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