Printable Hard Sudoku

Set 1314wx. 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 7 9 2
9 6 7
8 2 3 4
7 1 5
3 1 5
9 6 3 7
9 8
2 1 8
1 4 7
Hard #2
2 1 6 9
6 7 1
9 5 6
5 7 1
1 2 4
7 3 4 6
5 4 1 2
6 8
3 6 9
Hard #3
3 5 6 8
2 8 1 7
6 2
8 3 6
4 6 8 9
2 4 5 8
1 3 5
9 6 8
1 7
Hard #4
3 4 7
1 4 9
5 7
4 7 6
6 2 4
5 3 1
8 3 5
2 6 4 8 9
7 5 9 2
Hard #5
8 6 9 2
2 3 6
1 7
5 2 9 1
9 8 5
7 5 4
7 6 4 1
4 3
9 1 8 2
Hard #6
6 9 2 4
2
5 1 8
7 8 9
3 9 1 7
6 2 3
7 1 4 9 6
5
4 7 9 6 2
Hard #7
2 4
6 1
3 1 2 9
2 1 6 5 3 8
6 9 2
7 3 2 6
4 5 7
2 3 6
4 8
Hard #8
4 6 2 7
1 6
2 3 5 8 4
2 1 4
5 3 2
1 9 3
9 2 8
6 4
8 4 6 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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