Printable Hard Sudoku

Set 1g2kq21. 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
6 8 5 7
3 2 7 6
2 5 4
5 1 4
6 4 7
6 9 1 2 8
4 8 5
6 9
1 8
Hard #2
5 1 6
6 5 8 3
8 7 4 2
3
6 3 4 1 7
1 5 3
1
1 2 9 5
4 9 2 6
Hard #3
5 8 6
8 9 2 4
7 3 8
6 8 9
1 5 3 6 8
2
8 4 3 5
5 2 8
3 7 4
Hard #4
2 9 6
4 3 2
4 9 3
6 1 7 9
9 6 8 3
1 4 7
7 6
4 9 2 7
6 4 8
Hard #5
8 1 4 6
9 5 8
9
7 5 3
6 1 8 4
2 6 4
1 5 8 6 4
6 4 2 8
3 7
Hard #6
7 4 2
2 1 8 4
3 8 4 5 6
3 5
9 8
3 7 1
9 8 7
5 9 4
7 9 2 8
Hard #7
5 6 9 2
2
3 4 6 7
9 8 2 4
7 3 9
8 2 1
2 1 8 5
2 8 3
7 9 8
Hard #8
5 1 8 9 2 3
9 3 8
6 1
7 5 4 2
4 6
1 7 6
3 2
6 7 1
9 8 6 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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