Printable Hard Sudoku

Set 17m3rir. 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 8 2
6 9 3
3 9 4 7
9 5 7 6
8 5 9 1
7 1 8 2
4 1 5
4 3 8
6
Hard #2
7 6
8 9 1 5
4 6 9 3 5 7
2 9 1
6 9
3 6 4 5 8
4 3 8
5 9
8 5
Hard #3
6 7 3
5
7 2 8 9 1 4
5 3 2
4 9 6
2 5 7
9 1 2 3 7
8 1 2 9
6
Hard #4
9 8 6 5 7
2 5
4 8
6 9 4 1 5
5 9 3 2
1
4 7 6 8 9
2 4 7 6
7
Hard #5
6 4 8 5
1 3 2
8 9 6 3
7 3
5 1 8 6
7 1 9 5
3 6
5 9 7
3 4 7
Hard #6
2 4 3
3 8
3 8 7 1 5
3 7 8 4
8 6 2 5
5 4 8
1 3 2
1
7 3 5 6
Hard #7
7
3 8 6
3 8 4 1
3 8 2
2 6 4 1 9
5 8
3 8 9 2
9 7 6 5 8
4 5
Hard #8
7 2 1 4 5
5 4 6 8
3 2 9
7 9
7 9
2 8 5 7
1 7
9 4 6 7
1 8 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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