Printable Hard Sudoku

Set 2kfzg8. 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
2 9 3
5 2 6
8 1 5
6 8 5 4 3
6 9
9 1 2
3 2 1 7 5
1 6 4 8 5
Hard #2
4 2 6
2 3 1
8 6
5 3 7 9
8 6 4
9 2 5
9 2 8 4 3
4 5 1 2 8
8
Hard #3
6 8 3 7
9 7 4
3 6
5 8 2 4 1
6 5 8 2
1 3 7
2 6
5
4 5 9 1 3
Hard #4
5 4 1 2
6 1 7 5
3 8 6
3 7
5 4 7 6
9
7 9 6 3 4 8
7 5
2 4 1
Hard #5
7 5
3 8 2 7
8 1 4
2 1 8
1 8 2 4
4 3
3 9 1 2 6
2 6 4 3
8 6
Hard #6
1 4 3 9 7
8 4 5 1
8 1
4 2 6
7 5
5 9 8
3 6 9 2
1 5 9 4
7 6
Hard #7
6 9 7
3
1 9 3 5 8 7
2 6 7
1 3 6
2 7 3 9
5 1 8
8 2 3 9 1
5
Hard #8
9 3 2 4 6
3 7
7 2 5
2 4
8 1 6
4 6 1 5
2 3
4 8 9
6 9 4 5 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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