Printable Hard Sudoku

Set 32vwyi. 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 6 3
7 9
2 4 6 9
9 2 6 8 3 5
4 7 8 9
8 9
8 9 5 3 4
6
7 5
Hard #2
8 3 4 7
1 8 9
5 9 2 3 4
4 6 7 1
8 4 5
6
5 3 4
4 9
2 7 5 8
Hard #3
6 7
9 1
5 3 2
4 1 8
6 9
2 9 5 7
7 8 3 1
5 4 1 6
9 5 8 2 4
Hard #4
1 3 4 9 6
1
9 5
7 1 3 5
8 5 2
3 2 6 4
2 8 4 7 3
6 9 7 1
9
Hard #5
2 7 8 5
3 6 8 1 4
4
9 3 7 6
1 4 9
7 4
8 4 9 5 6
9 2 5 3
1
Hard #6
7 9 3 5
4 5 1 8
2 6
7 1
4 7 3 8
6 9 7
8 7 9 4 6
5 6 3 4
2
Hard #7
9 5 2 1 3
3 4
3 6 5 8
2
7 8 9 3
3 4 6
2 9
4 1
8 1 3 5 6 2
Hard #8
2 7 8
3 1 7
5 7 4 3 6
6 3 1
8 5 4 2 1
8 4 9
3 5 7
9 5 7
4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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