Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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