Printable Hard Sudoku

Set blsj11. 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 8 7 4
1 9 6
9 5 2
9 3 5 8
1 9 8 2
2
4 5 8 9 3
9 4
6 7 2
Hard #2
2 5 7 6
8 6 3
3 4
1 9 4 8
2 7
7 2 6 9 8
8 2
1 8 7 2 4
5 9
Hard #3
2 4
9 8 7 6 2
3
4 9 6 3 5
2 8 9 6
1
7 4 3 1 9
9 6 5 7 3
3
Hard #4
9 3 2 4
2 5 7 9
5 3
3 9 2 8 7
9 3 1
8 6
3 6
9 7 1
1 2 8 7
Hard #5
2
1 4 9
8 7 1 4 5
5 1
9 6
4 6 8 2 5
1 8 3
5 2 3 6 4
7 3 5
Hard #6
3 5 4
5 9 1
2
8
1 8 7 6
6 3 9
7 2 3 1 4
4 2 5
8 1 9 7 2 6
Hard #7
8 7 1 9 4
1 9 2
6 5 4
2 8 4 5 9
8 7
9 4 8 3
1 7
9 4
2 8 9
Hard #8
6 2 1 8 3
3 1 9 6 2
2 8
5 2 1 3 7 6
2 7 5
8 9
3 7
4
5 9 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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