Printable Hard Sudoku

Set 232xl5. 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
4 9 8 1
5 7
1 7 9 3 2
7 2 1 8
4 1 5 2
8
6 9 2 7
2 6
3 7 8
Hard #2
2 8 9
2
5 3 1 6 4
2 1
9 2 8 7 6
7 8 5
7 1
2 4 8 6
3 9 5 2
Hard #3
2 1 5 9 3
9 2 6
7
3 7 5 9
3
9 2 8 1
3 8 5
5 6 3 7
1 6 5 4
Hard #4
1 9
1 7 9 4 5
7 2 6
7 3
3 5 6 8
3 4
5 6 4 8 2
2 8 1
3 5 2
Hard #5
8 9 7 5
5 3 6 1
8 4
8 5 9 1 2
4 5 6
1 2 8
7 1
3 4 8
5 4 9
Hard #6
1 8 2 5
5 2 3
2 9 7
3 9
4 7 6
9 2 5 3 4
1 8 2
3 6
7 1 9 8
Hard #7
3 1 2 8 4
6 9 3
6 1 7
6 3 7
7 9 8 4
2 6
3 2 6
9 8
5 8 1 9
Hard #8
6
1 2 6 5 4
3
7 5 9
3 6
5 7 6 1
4 8 5 6 1 3
3 4 7
2 3 9 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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