Printable Hard Sudoku

Set 5ti95f. 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 9 4
6 2 7
7 6 3 8
3 7 2 6 1
1 8 6
8 7
5
9 8 3 2
5 8 4 6
Hard #2
3 4 9
8 3 7
2 6
9 7 5 1
4 5
1 3 9 5 8
7 4 2 3
8 6 5
5 6 7
Hard #3
6 2 4 8 7
7 5 8
5 4 3
7 2 1 9
8
3 6 9 7
6 5 1
9 7 3 5
5 8
Hard #4
6 3 4 1
3 6 5
2 8 1 6 3
1 6
3 2 1
8 5 4
5 8
1 7 5 6
4 9 7
Hard #5
7 3 5
8 2 6
4 2 6
4 9 1 2
6 7 4 8
1
2 5 7 4
9 1
5 1 6 9 2
Hard #6
5 1 3 8 2
6 2 1
4 5 6
9 6 5 1
6 7 8 2
4
9 5
4 5 1
1 2 7 3
Hard #7
6 8 9
5 9 8
2 4
6 4 5 9
9 6 5 2
2 1 4 3
4 1 2 3
5 8 1 6
9
Hard #8
8 3 2
2 5 3 1 9
9 2 5
8 7
6 1 4
6 3
8 9 1
2 1 8 9 7
1 5 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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