Printable Hard Sudoku

Set va8za0. 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
6 1 3
3 2 1
1 6 5
4 1 5 9 6
5 8 3
1 9 2 3
4 2 6
9
8 3 4 7
Hard #2
3 8
5 6 2 3 4
5 7 3
4 7 1 8 6 9
8 3 7 2
1 4
8
4 7 9 8
6 9
Hard #3
5 1 8 2
4 3
7 4 2 1
7 8 5 6
5 3 6 7 4
6 5 1 9
8 7 5
2 3 6
Hard #4
6 3 5
2 8 9
7 1
2 8 3 4 1
4 8 2 5 9
3 4
9 8 1
7 4 3
8 9 6
Hard #5
2 4 1 7 6
5 7 3 2 8
4 5
1 6
6 5 9 1
3 7 8
8 2 1 5
3
6 8 9
Hard #6
1 2 9 7
4 6
3 2 4
6 4 7
8 4 3
8 1 2 4 7
7 5 3
1 2
2 9 3 8
Hard #7
1 6 8 3
2 9 3 6 4
7 4 1 8 2
5 2 4
7 9
1 9 3
6 3
4 8 7
2 9
Hard #8
9 5 8 2 1
2 1 5
3 7 4 9
6 2 1 5
5 4 1 6
1 2
1 4
7
3 7 5 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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