Printable Hard Sudoku

Set 13qdmcy. 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
4 3 7
4 3
2 5 9
2 5 3 4
8 5 6 7 2
9 4 6
5 4
4 8 2
7 6 3 8
Hard #2
4
2 9 3 6 5 8
3 4 5
4 6
9 2
9 7 6 8
8 9 2 5
1 2 5 4 7 3
8
Hard #3
3 4 7 9
2 7 4
9 4 8 6
8 1 5 9
6 4 1
6 4
5 1 2 9 7
6 5
3 8
Hard #4
5 6 9
6 5
9 8
2 9 8
7 8 3 6 9
3 4 8 1
9 1 2 4 8
7 3
5 6 4
Hard #5
1 5 7
6 7 9 3
2 6
9 8 3 4
8 5 7
2 5
2 3 1 6 9 4
8
8 9 2 3
Hard #6
3 1 5
5 3 6 2
6 4 9
1 7 2
2 9 6 8
9 8 3
1
9 8 4 3
6 5 8 2
Hard #7
2 6
6 7 1
1 3 9
3 9 7 4
9 6
7 4 1 8
8 5 7 4 6
1 8
4 5 8 3
Hard #8
8 3
9 3 7 5
5 3 2 8 6
5 9 2
2 8 3 6 4
1 6 8
8 9 4
9 7
3 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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