Printable Hard Sudoku

Set 14bnax9. 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
5 4 3
3 2 9 4
9 6 5
6 9 7 2
1 3 5
4 3 6 9
7 6 1 2
8 9 7
1
Hard #2
6 9 8
2 7 1 9
4 7
1 7 3
9 8 5 2
4 7 3
6 4 1 5
2 9 8
9 3 6
Hard #3
8 1
5 3 6 7 4
7 8 3 5 9
4 2
9 5 4 7 2
7 3 8
2 1
4 3
3 5 6
Hard #4
1 6
5 8 3 2
4 7 1 5
9 6 2 3 4 7
9
2 6 1
2 5 9 8
4 5 3
8 7
Hard #5
7 9 2
4 9 5 8
1 2 7
2 3 5
9 6
7 8 3
6 5 1
6 8 1 3
7 4 5 2
Hard #6
4 3 6
7 4
5 1 9 2
7 3 5 2 9 8
9 1 7
1 9 4 5
8 4 7
6 5 8
2
Hard #7
2 8 6
8 6 7 5
7 5 9 6 2
8 2
4 1 9
1 6
5 6 2
5 1 6 8 4
6 3
Hard #8
8 9 6 5
6 3 9
2
7 3
9 7 1 8
5 3 4 8
3 8 7 1 2
2 5 1 3
5 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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