Printable Hard Sudoku

Set atr9s0. 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 3
7 6 5
2 9 8
2 1 3 4
4 2 6
9 8
9 3 8 5 6 7 4
5
3 4 7
Hard #2
7 4 9 1
9 1 5
3 6
5 7 2
4 6 9 2 5
3 1
4 7 9
9 6 7
1 7 3 8
Hard #3
5 7 9
2 3 4
8 5
7 9
8 4 1
3 2 9 1 6
8 4 7 6 5
1 6 7
6 9 3
Hard #4
8 7 3
4 9 8 7 6
7
3 1 8
4 6 5 2
1 2 8
1 2 6 4 7
5 8 4 9 3
Hard #5
8 7
4 9 5
3 6
7 8 2
4 5 8 6
2 3 1 7 8
7 6 4 1
2 5 9
1 8 6
Hard #6
3 7 8 1
2 4 5
8 3
2 5 3
9 3 2 1
1 2 5
5 7 6
6 8 4 7
4 2 8
Hard #7
2 5 8
6 5 3
3 2 5 8
2 7 1
5 6 4 1 3
7 5 2 9
5 7
3 9
4 3 7
Hard #8
6
7 9 2 8 1
1 5 7
9 6 4
5 4 9 7 1
5
8 2 3 6 9 7
3 8 6 1 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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