Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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