Printable Hard Sudoku

Set 7295ie. 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
8 2 4
2 9 4 5
5 2 7 9
9 1 5
1 9 8 3
4 7 6
9 8
5 3 2
Hard #2
9 3
1 5 7
2 6
5 4
3 1 2
1 7 3 6 5
9 4 2 7 5
3 9 5 4
5 7 3
Hard #3
2 6 7 3 9 5
5 3 6 1 8
9 8
3 1
8 6
4 5 9
1 3 2
4 2 1
1 5 4
Hard #4
5 6 8 4 9 2
9 3 1 4
9 7 8
2 1 6 4
5 8 7
1
4 1 3
8
6 7 9 5
Hard #5
6 1
2 1 9
8 5
4 6 9
7 3
9 3 5 2 7 6 4
6 7 9 2
9 2 3
3 9 8
Hard #6
3 7 1 9
5 8 4 1
2 9 3 7
8 3
2 1
8 4 2 5
9 3 4
1 4 7 8
8 2
Hard #7
8 9
4 3 6 2
1 2 8 3
5 4 1 6
5 4 3
3 9
3 2 9 5
7 5 9 2
1 6
Hard #8
1 3 2 7 8 4
2 3 8
8 9 6
6 9
8 2
1 6 2 4
5 8 1 7
9 6
4 3 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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