Printable Hard Sudoku

Set b5tdx9. 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 8 9 5
8 4 3 9
3 8 7
5 3 1
4 2 8 5 1
3 2
8 4 7 3
6 5 2 8
Hard #2
1 7
1 4 6 9
9 6
4 7
1 5 8 6 2
3 9 6 7 1
3 6 5 2 1
4 7
2 9
Hard #3
5 4 1
2 6
7 3 8 9
3 2 7
9 1 4 3
7
1 6 7 9 5
8 2
1 5 9 4 3
Hard #4
2 4 8
2 7
5 7 8 3
2 1 6 5
6 7 1
9 4 2
8 2
4 3 7 8
3 8 4 2
Hard #5
3 5
2 4 6
4 6 7 8
7 3 6
3 6 2 8
8 1 2 4
7 3 5 2
5 3 2 4
4
Hard #6
6 1 2 8
7 8 9 3
5 4 7
7 1 4 6
3 2 7
5 4 9
3 2
4 5
9 3 8 7
Hard #7
8 1 2
3 6 5
4 2 6 7
2 4
9 7 4 3
7 5 4
2 5 3 9 8 1
6 1 8 4
Hard #8
8
6 3 4 5
9 7 1
9 8 6 1 3
3 7 2
3 2 6 9 8
8
5 1 2 9
6 3 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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