Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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