Printable Hard Sudoku

Set 1r0af8q. 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 9
7 3 1 2
2 6 9
1 7 5 8
7 6 4
8 6 3 7
3 4
1 4 8 3
2 3 7
Hard #2
7 8 3 2
6 3 1
2 4 9
5 7 3
9 3 1 8
3 6 4 1
5 2 8 3
9 5
2 7
Hard #3
8 4
3 2 6 8
9 8 3 2 4
9 1
3 5 6
6 4 3 2
4 6 5 9
1
8 7 4 6
Hard #4
3 5
2 4 5 7 8
7 9 2 1
4 6
2 9
3 4 9 1 2
4 1
7 3 5 4
3 6 7
Hard #5
9 1 7 8 2
8 2 9
5 1
1 4 8 5 9
1
2 7
7 3 8
4 6 9 8
8 5 7 6
Hard #6
5 1 4 8
6 9 3
4
7 2 6 1 5
5 3 8 9
8 7
5 9 6 4
2 5
3 8 2 9
Hard #7
4 1 9 7 6
8 9
5 7 8
6 3 4 5
3 8 9
3 8 2
7 5 3 6 1
2 7
7 5
Hard #8
9 3 5
3 2 4 9
6 7 9 4
3 4 5 6
9 3 2
6 4 5
1 7 8
5 9 4
1 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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