Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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