Printable Hard Sudoku

Set 113sew1. 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 7 2
5 6 1
3 7 1
4 2 5 6
9 8
3 8 9
4 6
5 1 8 3 9
4 5 9 1
Hard #2
8 5
6 4 9
1 2 6 7 8
8 5
4 9 7 2
1 4 3 8
5 7 4
6 1 2
8 5 9
Hard #3
2 6 8 4
1 6 3 9
5 2
2
9 5 7 3 8 1
1 7 9 3
3 9 6 2
4 6
9 5
Hard #4
5 8
3 8 6 5 4
7 9 1
2 1 8
2 3 6 5 7
1 8 2
6 8 4
3 1
9 7 8
Hard #5
5 2 3
6 5 1
1 8 6
7 2 6 5 8 9
5 1 2
3 8 1 4
9 7 8
4 9 6
7
Hard #6
3 2 8 1
8 6
7 6
3 2
6 3 5 1 2 8
1 7 8 5
4 5 2
2 9 1 8 4
7
Hard #7
4 5 7
8 9
5 7 8 3
9 3 1 8
6 8 4 1
2 5
9 5 6 3
6 8 4
1 7 5
Hard #8
9 8
1 3 5 6
9 2 3 7
5 4 6 8
6 2 8 1 3
9 8 5
3 4 8 6 1
8 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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