Printable Hard Sudoku

Set ev9yi1. 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
8 6
8 1 7 9
9 5 8
1 4
2 6
5 8 2 9 1
9 1 8 7
2 7 6 1
3 2 9
Hard #2
4 9
7 6 8
3 6 5 8 4 7
6 1 4
1 6 9
8 4 1 2
7 8 6
7 1 9
2 3
Hard #3
3 7 6 4
1 4
8 2 1 7
5 2 4 7 9 3
9 3
1 8 7
4 1 5 3 8
1 9
4
Hard #4
4 7 9 3
2 9 1
7 6 2
7 8 9 2 3
3 1 2 7
5 2 8
8 6
9 1
5 1 4
Hard #5
5 2 8
6 4 9 7 2
4 9
3 4 9 5
1 5 3 9
2 9 8
4 2
7 8 5 3
5 2
Hard #6
8 9 1
6 1 8
7 3 6
2 8 1 3
6 2
9 5 4
1 8 6 7
2 6 5 7
3 7 4
Hard #7
5 9
1 2 6
7 8 3
4 6
9
6 4 3 1
2 5 1 4 3
4 3 9 7 6 5
6 3 4
Hard #8
7 2 6
6 3 7 4
3 8
8 3
4 6 1
8 6 7 3
5 1 7
6 1 4 5 9
9 8 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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