Printable Hard Sudoku

Set a38e73. 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
1 9 2 8
2 4 7
9 3 2 5
1 6 4 7
5 3
5 9
8 2 6
3 6 1
6 2 4 8
Hard #2
5 3 4 7 6
1 8
1 3 6 5
9 7
5 3 4 2
2 8 6 7 1
5 2
2 4
7 1 5
Hard #3
5 3
1 7 2 8
8 4 1 9
5 9 6
8 7 4
8 6 3
9 6 4 8
2 3 4
2 1 7
Hard #4
4 5 8 1
7 2 3
3 5 9 6
8 7 3 2
2 3 6
6 2 4 1
7 3
6 5
9 1 4
Hard #5
9 4 8 6 1
5 7 3
7 2 5 4
3 1 5 9
2 6 4
8
4 1
9 3 8 6
3 8 6
Hard #6
2 4 6
6 4 7 5
8 4 3
9 5 1
5 6
7 3 9 8
4 3 6 9 2 7
1 7 3
5
Hard #7
2 9
5 4 3 7
9 7 6 5 8
6 7 4 9 8
7 3
2 1
8 9 2 4 6
1 9 6
8
Hard #8
7 3
4
5 2 1 4
8 5 2 1
8 4 9
7 1 4 2 8
9 3 8 2 4
2 7
4 9 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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