Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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