Printable Hard Sudoku

Set r9bxju. 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
7 9
4 6 7 5 8
6 8
9 8 7 5
2 8 3 1
2 6
4 1
9 5 7 3
3 7 9 4
Hard #2
5 6 2
1 8 6 3
6 4 5 1
9 6 4
3 5 1 9 6
2 1 3
9 4 8
6 3 5 2
Hard #3
4 3 2 5
2 1 3
5 4
9 2 1
1 3 5 6
4 1 7 2
7 2
6 2 9
7 8 5 3
Hard #4
7 1 2
3 6 5
2 3 9
1 8
1 3 4 8 5
5 3 4
5 4 2 9
6 7 5 8
4 3
Hard #5
1 3
3 1 5 7 6
7 6 2
8 2 5
8 9
9 7 2
9 6 5 1
1 7 9
5 1 3 8
Hard #6
6 3 8
8 5 4
3 4 6
6 5 7
3 2 1 6 9
9 2 4
2 9 5 3 8
8 2
6 1
Hard #7
8 1
7 9 8 5
2 6 1 7 9 4
4 9
4 6 5 1
2 5 6
2 4 6 7
5
3 2 5
Hard #8
7 9 5
7 6
4 5
5 1 2 6
4 8 2 9
1 2 4 3
2 5 7
5 2
8 1 7 5 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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