Printable Hard Sudoku

Set bmqp99. 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
3
4 2 3 9
5 2 6 7
1 7 2
3 5 6
6 1
3 8 1 2
6 8
1 7 6 9 8 3
Hard #2
7 1 9 3 2
6 5
5 8 2 1
7 1 5
5 7 3
2 7 6
3 4
2 7 8 3
7 1 5
Hard #3
4 2
7 6 9 5
8
3 2 7
6 5
1 5 4 6
5 9 4 1 7 2
7 6
9 7 2 3 1
Hard #4
7 2 6 1 5
8 5 4 6
6 7
8 3 2
3 8 5 7
5 1 9
8 7 2
7 5 1 9
5
Hard #5
9 5 2
7 6 4 3
3 8
1 5
4 5 6 9 1 7
8 1 5
4 7 6 9
3 2 6 7
4
Hard #6
1 3 4
8 4 7 5
4 8
9 1
5 2 9 8
4 6 8 9
7 9
6 2 1 7
1 7 2 5
Hard #7
3 9 1 6 4
8
4 7 2
9 6 7 3
5 6 2 1 9
3 4 5
3 6 8
5 6 3
7 5
Hard #8
3 7 1 5
7 6
2 9 3
8 4 2 7 3
4 3 8
8 1 4
9 5
1 2 5
7 3 9 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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