Printable Hard Sudoku

Set 19a44mz. 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
3 2 1
3 4
8 6 2
6 5 4
7 1 8
8 2 4 5 9
7 6 9
9
2 5 9 4 1 3
Hard #2
1 6 5
2 8
9 5 1 4
6 3 8 4
2 9
1 3
4 9 6
8 9 6
7 3 9 8 4 1
Hard #3
2 4 3
5 8 6
4 6 1 3 8
8 5 7 1 4
6 2 8 7
6
7 3 4
6 2 7
6 5
Hard #4
2 6 7
9 4 5
3 6 8 5
1 8 2 9 7
6 3
8 7 2
4
2 1 8 6
8 7 4 1
Hard #5
7 3 9 2 4 5 8
4 2 5
6 3
3 8 1
7 8 1
5 6 3
8 1 5
9 7 3
7 2
Hard #6
9 5 4
7 5 1 9
4 7 2 5 8
9 3
3 7 1
1 8 2 5 7
4
3 5 2
1 6 3
Hard #7
5 6 1
8 5 3 2
4 8
9 2 1
3 5 6 7
7 4 1 8
1 9 4
5 6
2 4 3 8
Hard #8
5 8 3
2 7 4 8
3 9
6 2
1 8 9 2
2 7 1
5 6 9 7
8 5 7 6 2
8 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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