Printable Hard Sudoku

Set l64vy0. 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
7 3
3 6 7 2
5 3 2 9 6
9 6 1 4
4 6
8 7 3
9 7 4 1
5 7 4 9
6
Hard #2
8 2 4 3 5 9
1 7 5 2 6
1 4 9
5 3 2
2 9 1
4 8 5 3
9 8 6 7
3
Hard #3
8 4 9
9 6
7 3 2
4 6 1 8
4 9 5 1
2 3 6
6 1 2 3
9 5 1
1 5 2
Hard #4
2 6
2 1 5 6
7 3 5 2
1 7 8
7 3 9 6 4 5
4 1
5 8
8 9 3
3 6 5
Hard #5
8 6 4 3
4 3 2 9
5 4 7
9 6 5
6 4 3 2
5 3
1 8 5
2 7 1
1 6 3
Hard #6
8 7
3 2 4 8
5 7 6 3
9 7
4 5 1
1 4 6
5 1 4 2 3
4 8 5 1
2 8
Hard #7
7 6 1
8 9 6
3 4 7 5
6 1 2
2 8 9 7 6
3 4
3 7 6 9
5 4 2
4 9
Hard #8
8 3
7 4 6 8
2 8 1 4
6 2 1
5 6 2 7
4 1
4 8 1
6 9 3
1 5 8 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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