Printable Hard Sudoku

Set m92brr. 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
5
9 8 5 4 3 2
2 3 4
4 5 1
9 5 2
6 8
2 7 3 1 9
9 5 8 7
7 5
Hard #2
9 2 6 1
8 6 4
4 7 8
3 9
7 3 9 4 6
4 9 8
2 3 7
6 2 1
5 8 9
Hard #3
1 9
7 3 6 2
8 2 1 9
4 1
3 9 7 6
5 8 7 2
4 8
7 9 5
6 1 9 7
Hard #4
6 5 3
1
3 1 2
7 4 6 9
2 6
6 4 5 3 7
7 5 6 1
8 4 2
9 4 7 8
Hard #5
4 8 7 6
5 4 3
5 9 1
1 4 5 2
6 3 2 5
7 5 2 9 8
6
8 6 7
2 1
Hard #6
9 7 2
7 5 6 9
4 8 3 5
4 5 6 2
2
3 9 2 4
1 7 4
2 1 9 8
5 8
Hard #7
9 4 7
7 2 6
4 1 9 5
3 8
2 5 4 9
3 4 9 1
7 3
8 5 4 1
4 8 9
Hard #8
1 2 4 9
4
6 7
9 3 7 4 1
8
3 4 8 5 7
3 2 1
6 4 9 8
8 7 5 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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