Printable Hard Sudoku

Set 123tjm1. 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 2 8
8 1 3
8 2 7 4 1
8 9 4 7 3
7 9 8
1 2
9 3 2
1 8 7 6
5
Hard #2
8 9 2 5 4 3
3 5 6 2
1 9
6 9
7 4 5
5 3 2 9
2 3 6 8
8 7
7 6
Hard #3
6 4
6 9 3 8 1 7
4 8 9
2 6 7 1
9 6 3
3
1 8 4
3 9
7 6 5 2 8
Hard #4
9 8
5 2 7 4 9
2 6
4 7 5 6 1
7 1 6
1 9 3
3 5 8
8 2 4 9
7 2
Hard #5
4 1 6
9 5 8 2
1 3 5
7 6 8 5
3 1 6
8 1 2 4
3 5 6 7
3 2
1 2
Hard #6
6 8
5 1 4 9
4 6 1 3
5 2 1
6 3 8 7 5 4
3
8 7
1 2 9
8 6 7 3
Hard #7
5 8
8 7 5 2 9 3
2 9 7 4
9 2 7
3 8
7 2 5
5 9
1 4 6 7
3 8 5
Hard #8
6 7 5
3 6
4 7 5 1 3 2
3 8
5 7 6
6 1 8
1 7 2 9
6 9 4 7
8 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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