Printable Hard Sudoku

Set xaaj7m. 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
3 6
3 9 8 7 1
8 1 3
1 6 7 5 2
2 9
4 1 9 3
8 4 6
2 9
6 1 4
Hard #2
1 7 4 9
6 9 1 2
2 4 6
3 8 2
2 1
4 8 3 5
9 8
6 5 3
5 1 2 6
Hard #3
5 8 2 3 4
3 1 9
1 9 5 4 7
2 4 3
7 1 2
2 3 5 9
4 8 6
2 1 7
Hard #4
9 6
5 8
7 4 9 3 2
7 5 9
3 2 5
9 1
3 4 8
5 2 9 7 1
1 3 5 8
Hard #5
9 1 5
7 6 9
6 1 8 5 7
8 7 2
2 9 1 6
7 1 2 6
1 5 3
5 8 4
6
Hard #6
7 3 2
8 3
9 2 4
3 9 1 7
4 3 9 2
6 8 9
1 9 6 5
6 9 8 4 1 2
Hard #7
6 5 9 2
3 7
1 6 2 8 4
7 3 9 6
2 9
5 8 3 2
8 3 1 6
1 9
2 7
Hard #8
7 1 2 5
6 3 2
2 1 6 4
7 1
7 9 2 8
1 3 5 4
5 3 2
4 8 5
3 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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