Printable Hard Sudoku

Set b6u2kx. 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
4 5 6 7
8 5 3
7 8 9 3 4
3 9 1
1 5 4 6
8 2
1 7
9 1 2 8
3 7
Hard #2
1 7 8
6 7 5 1 4
9 4
8 1 5
2 3 8 9
7 5 9 2
7
3 2
5 1 3 2 4
Hard #3
1 3 6
4 3 8 7
7 6 1
1 8 4
4 2 1
1 2 3 7 5
9 5 8
8 1 6 3
2
Hard #4
9 1 2 5
5 8 9 3 1
2 3 6 9 7
6 2 8
1 9 5 4
2 4 3
9 7 1
5 8
Hard #5
9 2 4
4 3 2
1 7
8 1 5 6
1 6 7
4 3 5
8 4 9 6
6 3 4 8
1 9 5
Hard #6
6 5
1 3 2 9 5
4 7
9 3 2
8 6 9
3 4 8
1 8 2
8 2 3 6
2 4 9 1
Hard #7
5 6 9
9 5 3
3 9
7 9 1 4 3
2 3 1 5
2 7 6
1 7 8
1 8 4 3
7 2
Hard #8
7 2 4 3
1 5 9
5 6
5 9 7 2
2 1 4
5 8 9
7 3 5
8 1 4 3
6 3 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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