Printable Hard Sudoku

Set 14p8evt. 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
6 9 8 2 3
4 8 6
2 5 4 9
1 6 3
2 8 1 4 7
9 4 6
3 5 2
7
9 4
Hard #2
9 2 8 7 4
3 9 8
3 5 6
4 3 8
8 6 3
4
6 2
4 5 2 1 3
1 7 9 4
Hard #3
7 5
1 9 3
2 9 4 8 7
9 2 4
4 1 6 8
5 2 6
9 8 6 7 2
3 5
2 3
Hard #4
3
5 7 6 9
4 8
7 5 3
4 2 5
1 8 9 4
9 8 1 5 6
6 3 7 4 9
4 2
Hard #5
4 2 6
2 6 4
5 1 4
1 6 7 3 5
3 7
8 7 1 4
7 1 6
4 8 3
2 3 1
Hard #6
3 1 2
5 2 6 9 8
6 3 7
2 4 1
6 9 8
8 6 4 2
8 3
9 2 4 6 1
9
Hard #7
1 7 4 8
3
6 1 3
5 7 4
7 1 6 5
8 4 2 1
7 9 4 6
6 8 9 5
7 8
Hard #8
8 9 4
4 6 1 3
9
6 8 7
3
4 9 2 1 3 7 5
7 5 4
2 1 5 6
1 4 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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