Printable Hard Sudoku

Set r7wbwo. 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 2
4 1
9 1 3 2
9 7 4 3 1
4 9 3 6 8
8 6 9
3 9
8 6 2
5 4 7
Hard #2
8 4 2
3 1 8
5 6 2 3
7 1 6 9
9 6 5 2 3 8
2 4
4 1 7
9 5 1
9
Hard #3
9 8 7 1 4
2 5 6
5 7
1 9
4 3
9 2 4
6 1
2 4 6 3
8 7 9 5 4 2
Hard #4
1 4 2 7
9
4 9 3 5 1
9 7 8
3 1
5 8 1 9
5 6 2 4
7 9 6 2
7 1
Hard #5
8 5 7 2
7 3
9 4
9 2 4 3
7 2 1 4
7 3 5
6 4 2
5 4 9
2 7 9 8
Hard #6
7 1 8 3
8 4 7
6
7 9
5 1 4 9 6
9 5 7 2
1 2 5
4 8 6 1
6 9 3
Hard #7
8 4 7
7 2 6 8 5 1
2 5 9
6 3
1 4 2
5 9 3
6 4 8
8 7 4 5
2 9
Hard #8
9 6 7 2
7 3 4 5 8 6
1
3
4 1 5 2
6 8 4 7 1
4 1 9
2 3
3 2 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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