Printable Hard Sudoku

Set 1jntp0z. 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
4 1 2 9 8
2 7 4 3
3 5 9
8 9 7 2
9 1 4
5 2
3 6 2 5
2 7 5 8
Hard #2
6
4 3 8
7 3 1 8 2
7 1
8 2 1 7 3 9
5 8
5 3 1 4 7
1 7
9 2 8
Hard #3
4 1 7 3 9 2
1
5 8 7
5 1
1 6 7 4
7 5 3 1
8 9 2
7 6
3 8 1 5
Hard #4
2 4 5 8
6 5 7 8
9 2
1 7
9 7 2 4 5
3 1
3 8 6
1 5 6
6 4 1 9
Hard #5
1 3 9 8 5
7 4
4 1 8
2 3 9 8 6
3 1 4
3 4 5
5 2
2 7 5 3
8 9
Hard #6
7 8
1 9 5 6
6 5 2 9
9 2
7 1 4
2 1 3
7 8 2 6
9 3 5 8
8 4 1
Hard #7
8
1 2 6 7 3
7 8 3 1 5
1 5 3 9
5 3
9 8 5
3 7
6 4 1
1 5 6 8
Hard #8
7 2 4 3 5
8 7 6
9 4 6 1
9 3 8 6
7 5
6 9 2
9 8 2
3 4 6 1 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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