Printable Hard Sudoku

Set 1u8jrhg. 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 1 2
4 1 9 7
3 8
7 6
2 6 8 9 4 3
1 8
8 9
7 6 9 3 4
2 9 6
Hard #2
4 3
7 9 1
6 9 8 3 2
3 4 1
4 8 5 2 6
8 9 4
7 3 8
9 5 1
6 8
Hard #3
3 5
4 9
2 1 3 8
3 7
5 9 8 6 1
8 3 2 5
6 7 9
2 5 6
8 7 4 6
Hard #4
6 9 7
9 5 4 1 8
2 6 8 3
7 9
5 1 4
6 2 7
7 6
1 4 8 9 3
8 3
Hard #5
4 7 8 1
8 9
1 9 5 4
7 3 2 9
8 3
5 1 9 4 8
9
8 1 2 3
9 6 7
Hard #6
8 5 1
3 4 9
6 1 2
2 7 3 4
6 8 4 1
9 7 8
1 2 5 7 3
3 2
5 9
Hard #7
2 9 6
3 1 8 5
6 7 9
8 2 6
5 9 2 3
7 2 6 9
6
5 7 8
2 9 3 6
Hard #8
3 8 1 9 2
8
4 9 7
9 1 2 5
7 6
4 3 1 9
2 4 6
9 8 5 6
5 7 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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