Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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