Printable Hard Sudoku

Set rgue01. 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
9 8
1 7
4 2 6 1 3
6 1 2 4
3 5 9
8 1 6
6 9 5
3 2 6 4
5 6 7
Hard #2
5 6 1
7 4 8 3
6 1 9
3 6 9 7
8 2 5 1 4
8
5 7
3 1 9
9 5 3 8
Hard #3
1 5
2 4 6
7 3 6 5 8 2
8 4 6 5
2 9 4
4 7
5 7 3
5 9 4 7
1 5
Hard #4
3 7 2
5 4 7 1 2
4 8 9 3
6 4
5 4 7 6
1 6 3
7 8 4
1 7 8
9 6
Hard #5
5 9 4 3 7 2
6 1 5
6 9 3
8 6 2 1 4
4 6 7
3
2 1 7
9 1 4
4 8
Hard #6
6 2 1
8 4 3 6
5 8 7 9
6 4 5 8
5 9 4
9 4 3 6
8 5
4 1 9
3 1
Hard #7
6 9 3
5 6 7 1
5 4 8
9 4 5
7 8
8 1 5 4 9 6
5 1 6
2
8 4 7 5
Hard #8
1 3 9
3 8 5 7
6 5 9 7 2
2 5 9
8 1 4
2 8 1
1 7 2
4 7 5
3 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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