Printable Hard Sudoku

Set k7m76h. 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 1
1 2 4 3
6 3 4 9
4 6 3
8 5 4
3 9
7 1
5 8 4 9
7 1 2 9 5
Hard #2
1 7 2
2 6
8 7 2 1
8 5 4 7
9 5 1
7 2 3 8 5
9 8
3 6 9
6 1 2
Hard #3
6 7 8
4 2 5 3
1 6 2
2 7 9 6
5
9 6
1 2 5 3 7
7 9 8 4 2
4 1
Hard #4
3 9
4 5
3 7 1
1 2 7 5
7 5 4
5 8 2 4
2 7 9 6 8
8 6 1
5 4 2
Hard #5
7 3
8 3 9 7
5 3 8 2 4
2 4 7
9
6 1
6 4 2 8 5 3
5 1 7
7 6 5
Hard #6
1 2 9 4
8 6 7
6 5 7 3
3 5
5 9 1 8
7 5 9
1 7
1 2 6
9 6 4 1
Hard #7
4 3 6 7
9 1 5 6
7 1 9
9 2 3 8
4 6 5
5 8 9 1
7 5
3 7
2 6 9
Hard #8
4 6 7 9
7 2 3
3 5 7
4 5 1 3
7 4 5 9
8 4 6
6
8 9 7 1
3 2 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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