Printable Hard Sudoku

Set wr1jat. 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
2 9 5 6
5 4 2 3 7
3 4
6 7 5
8 4 9 5
9 4
9 5 6 2 1
3 2
8 5
Hard #2
6 1 7 5
9 1 4
3 7 8
1
3 5 9
8 9 4 7
9 2 7
4 2 7 5
7 8 1 3
Hard #3
1 3 8 7 2
5 1 3
9 7 8
7 6
3 1 5
5 4 2
4 3 7 2
2
8 7 5 6 4
Hard #4
3 1 5 8 9
8 4 3 1
4 1
6 7 2
9 1 6 2
6 3 9 4 7
7 9 2 3
3 8
Hard #5
3 7 1
1 3 2 6 5
9 4 7 8
4 9 5 1
6 2 3
3 9 2
5 7
8 6 7
8 6
Hard #6
2 6
6 9 4 5
8 9 6 7
7 6 3 8
9 5 4
1 2 6
3 5 7
7 8 4 1
4 5
Hard #7
8 6
5 1 7
2 9 1 4
5 8 2
3 5 1
6 1 8 7
9 7 6 1 8
4 3 9
3 5
Hard #8
9 3 8
4 7 3 5
1 2 8
1 3 2 5
9 3 1
6 1 7 3
6 7 5 4
9 8
5 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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