Printable Hard Sudoku

Set 1q91sxb. 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
9 7 8 1
1 3 8 9
8 2 9 5
9 2 6 8
1 7 5
6
5 3
4 1 7 9 6
2 8
Hard #2
7 9 4
8 3 9 6
2 4 3 9
3 2
5 1 6
2 5
6 1 2 7
2 7 1 6
8 4 1
Hard #3
7 6 3 1
9 3
3 8 6 2
5 3
1 2 7 8 5
8 4 1
3 9 6
9 6 3
8 1 5
Hard #4
7 8 3 6
3 9
9 6 5 2
5 2 3
2 9 1 7
9 3 7 1 6
7 6 9 5
6 4 9
Hard #5
6 7 5 2
4 7
1 2 8
3 2 6 1
2 5 7 9
7 1 2
1 3
6 1 2 9 3
9 6
Hard #6
8 6 5
9 4
2 5 1
3 4 8
3 8 1
5
1 7 8
7 8 3 4 5 9 6
5 7 9 1
Hard #7
8 2 5 7 1
6 7 9 2
2 1 8 6
3 9 6
6 9 4 1 2
3 5
8
8 5 3 1
5
Hard #8
1 2
9 7 1 5 3
5 3 6 7 4
7
4 9 7
4 2 8 9
2 8 3 9 1
1 6
9 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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