Printable Hard Sudoku

Set ru3vv5. 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 6 2
6 9 5
6 3 1
6 4 7 9
1 7 3
1 8 9 6
4 5 7 9
6 4
8 2 7
Hard #2
5 2 8
8 5 9 6 4
7 3
6 9 3 1
1 7 6
5 7
9 8 6
6 5
5 3 1 6 2
Hard #3
9 3 1
3 4 8 6
8 2
7 1
8 4 2 9 7
1 2
7 6 5 1
4 6 1
1 8 5 6
Hard #4
6 3 5 7 8
9 6 7
1 2 9
1
3 2 8
7 3 6 5
2 1 9 5
7 6 1
5 2 8
Hard #5
9 4 3
5 3 6 8
3 5 6 4 8 2
6
9 4 3 1
7 4 8
6 7 1
7 5
4 2 5
Hard #6
5 3 9
6 2 7
6 9 7 8
2 7 8 1 9 4
4 3 5 2
5 8
6 1 8
6 2 8
9
Hard #7
4 2 7 9
4 1
5 3 4
8 7
6 4 9
6 3 5 8
7 5 8
9 6
1 9 6 4 3 5
Hard #8
2 6
1 7 3
1 6 5
4 6 3 2 1 9
2 4 1
5 2 7
3 9 5
1 7 3 2 4
3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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