Printable Hard Sudoku

Set k09l3t. 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 3
7 3 2 1 9
6
4 3 2 1
5
4 7
3 8 9 1
2 7 8
5 8 2 6 3 9
Hard #2
3 5 7 8 4
9 1 7
6 5 3
6 8 7 2
9 3
2 5 7 8 6
5 4
4 7
1 3 2
Hard #3
9
7 6
3 6 1 9 2
3 4 9
5 7 3
7 3 9 8 6
1 9 7 8 3
6
8 5 4 1
Hard #4
8 9 2
9 1 2 8
6 4 1
6
3 4 1 8
6 7 8 5 4
2 5 3
3 5 4 9
6 4
Hard #5
1 3 7
6 7 4
8 1
4 2 5 1
5 1 2 8
1 2 3 9
8 1
7 1 5
3 2 9 8
Hard #6
7 4 9 2 1
3 5 4 7
1 9 8 3 2
5 1
9 2
4 1 8
2 6 9 5
3
8 5 2
Hard #7
6 1 5
7 3 4 6
4 3 9
5 3 4 7
4 1 8
7 9
1 4 2 5
2 6 9 3
8 5
Hard #8
9 5
8 4
9 3 1 5
5 3 6 8
3 6 5 4
7 8 2 5
2 3 5 7
9 2 8
1 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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