Printable Hard Sudoku

Set 11cx59. 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
5 4 8
7 5 1
8 3 9 5
6 4 3 1
3 4 6
7 3 8
5 9 2
8 3 9
1 5 6
Hard #2
1 5
9 3 8 2 6 4
4 2 8
8 3
3 4 5 7
1
9 3 7
7 6 1
6 4 7 5 8
Hard #3
6 7 4 8
2 4 1 7
7 3
6 4 1 9
2 6
1 4 8
8 1 9 6
4 2 5
7 1 8
Hard #4
1 5 4 9
4
4 1 3 7
2 3 7
3 4 9 5
4 6 1
4 2
9 2 8
8 2 6 5 9
Hard #5
7 3 8 5 4
9 8
8 6 9 3
4
6
1 6 8 5
3 6 2
6 1 4 8 9
2 7 8 6
Hard #6
8 3
9 1 6 2
8 3 4 1
9 7 5 2 8
7 2 6 3
2 3 7
6 1 4
1 5 9
5
Hard #7
2 7 1 3
2 5 6
6 8
5 8 3
8 7 2 1 4
1 9 4 7
9 6 1 2
7
3 6 4
Hard #8
6 8 3 9 4
2 3
1 6 7
2 6 9
1 2 5 6
5 3 9
3 7 6 5
8 7
7 5 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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