Printable Hard Sudoku

Set 1xr6gpj. 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 4 3
1 2 9
3 5 6
3 2 6 9 1
7 1
9
9 2 8 7 3 6
8 1
6 5 7 4
Hard #2
8 1 7
9 1
2 5 9 3
1 8 9 6
4 2 8
8 5 6
4 6 9 7 8 5
1
2 6 7
Hard #3
9 3 8
8 4
4 2 1
1 3 7 8 4
7 3 9 2
9 6 5
1 6 2
2 6
4 8 5 7
Hard #4
3 2 1 8 7 5
9
8 4 9 7 3
8 6
7 9 5
4 2
5 2
2 6 1 3 4
2 1 6
Hard #5
4 3 9 7
4
7 5 9
5 3 4 7 1
8 2
1 3 9 8
2 6 5 9
5 9 6 3
3 5
Hard #6
4 9 8 6 7 1 3
7 1 3
1 8 6
1 7
7 4 3
2 5
2 4
1 4 8 9
8 5 7
Hard #7
4 6 2 8
2 4 1 7
3 9 5
3
4 2
5 3 8 6 9
6 9 3 2
1 6
4 8 9 6
Hard #8
6 9
6 2 9 4
8 4 7 5
6 4 7 1
9 8 4 6
7 2
2 1 5
9 1 6 8
7 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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