Printable Hard Sudoku

Set m5prty. 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
8 3 5 1
3 8 6 9
2 9 5 1
7 2 6
1 2 7 4
5 4
5 9 7 1 6
6 3 9
Hard #2
6 1
3 7 2 9
8
8 7 4 3
7 6 8 5
9 2
2 7 4 6
5 3 6 8 7
4 5 2
Hard #3
3 4 8
1 3 8
6 1 7
3 4 6
9 1 2 4
3 2
7 9 6 5
4 6 9
1 8 3 2
Hard #4
2 7 6 9
6 8 4
1 3 6 7
4 5 1 6 9 2
2 4
5
2 4 7 8
6 9
6 8 3
Hard #5
7 6 3
9 7 5
2 4
9 3 4
5 6 1
3 9 7 6
3 1 4 6 8
7 6 9
2 7 4
Hard #6
1 8 3
5 2 6 7
5 3 4
3 1 4 9 2 5
9 5 4 1 8
4 6
5 6 7 9
8 1
Hard #7
9 2 1
9
8 6 3 5
8 7 9 1 5 6
1 4
5 3
5 9 8 6 3
2 3 7
6 8 1
Hard #8
6 7 3 9
6 2 7 8
9 1
4 1 9
3 7 6
8 3
4 5 1 6
9 3 7
1 7 6 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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