Printable Hard Sudoku

Set 5v8kib. 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 8 1 9 6
7 5 9
6 8 3
9 8
2 3 7 5 9 1
1 3
5 9
3 7 2
1 2 6
Hard #2
3 8 6
8 6 9 4
7 9 5 3
1 8 5
1 3 2
6 9 2
8 5 2 9
2 6 1 7
4
Hard #3
2 5
1 7 8 2
3 7
5 7 9 1 2 6
4 5 3 9
6 7 4
3 1 8 9
6 5
4 2
Hard #4
9 4 6
2 6
5 9 3 7
1 3 2
3 4 1 2 5
7
1 5 8 4
3 6
6 7 2 8 9
Hard #5
1 2 5
7 2
1 9 3 8 2 4
3
6 8 4 9
3 5 1 2
6 3 7
4 3 2
4 7 8
Hard #6
3
6 9 2 1
4 3 8 9 6
5 7 9
3 1 6 7 2
1 8 3
4 3 1
9 4
5 8 6
Hard #7
5 1 8
8 3 6 7 1
7 8 6 1
6 9 3
1 4 3 9
2 4 9
1 7 9 2
9 3 5
Hard #8
4 9 7
8 5 1
7 6 9 5
8 5 9 4
5 3
6 7 4 8
5 8 7
7 3 2
2 3 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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