Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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