Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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