Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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