Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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