Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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