Printable Hard Sudoku

Set p8m2xa. 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 8 3
9 8
7 4
5 9 1
7 2 5
9 7 1 4
3 4 8 9 2 1
1 8 6 7
7 4
Hard #2
4 1 2 6 7
3 5 6
7 3 1
1 5 3
7 6 2
8 1
8 2
5 2 8 3
4 3 6 8
Hard #3
4 1
7 6 8 5
4 2 1 9 7
3 7 6 8
2 4
1 5 3
5
7 1 9 4
9 5 8 6
Hard #4
5
7 4 9
3 1 5 4
4 9 3
2 1 4 8
2 6 7
8 2 3 4 1 9
1 2 3
9 4
Hard #5
2 3 7
7
5 7 8 1
3 8 4 7 5
1 7 2
6
8 4 3 5
5 9
5 9 1 8 7 4
Hard #6
3 7 6
1 4 2
3 6 8 5 1
5 4
4 1 9 5
6 7 1
2 6 9
6 2 3
8 3 2
Hard #7
9 2 4 3
9 1 7 6
2 6 5 9
7 8 5
6 9 7
8 2 3
4 3 8
1
3 1 8 6
Hard #8
1 2 9 3 7
5 6
7 4
9 8 2 7 4
9
3 9 5
6 3 9 8
1 7 8 4
1 5 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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