Printable Hard Sudoku

Set han6eg. 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
6 1 7 3
2 1
9 2 7
1 2 8 9 3
9 7 6 5
7 3 8
6
8 4
6 3 1 5 7
Hard #2
9 3 5
5 2 6
2 6
4 3 5 9 8
4 8 1
8 4
4 1
7 6 1 4
1 2 7 3 8
Hard #3
9 8
1 4 3
7 3 1 4 2
5 8
7 1
4 1 6 8 3
2 1 5 9
7 8 1
3 1 7
Hard #4
2
2 1
5 4 8 7
3 7 4
2 8 9 3 6 5
6 1 3
5 7 1
9 7 1 8 4 6
3
Hard #5
4
9 7 2 1 3 5
1 8 7
3 1
8 7 1 5
4 8 7
5 1 7 6
2 3
8 6 4 9
Hard #6
7 6
1 2 5 4
4 2
1 9 8
8 9 2 4 5
6 5 2 3
3 4 9 7
3 4 8
8 1
Hard #7
8 6 9 5 4
7 1
1 6 9
2 4 9 3
7 5
6 9 7 2
5 3
8 2 1
3 2 7 8
Hard #8
2 4 3 1
3 1 5 4
7 6 3
8 9 4 3
6 9
6 7 2
8
3 5 7 9 2
5 8 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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