Printable Hard Sudoku

Set m8waj7. 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
9
5 6 4 9
1 7 5 6
3 9 5 1 4
4 2 5
4 1 5 8
2 5
3
7 1 4 3 8
Hard #2
9 7
4 6 5 1
9
2 8 4 7 3
3 1 2 8
9 6 4
7 1 4 3
4 6 9
3 2 8
Hard #3
2 9 8
9 7 1 6 5
5 4 7
3 1
9 3 8 5
6
8 6 1 2
1 4 9 6
9 3 7
Hard #4
4 7 8
3 9 5
9 5 2
8 2 9
9 1 6
7 4
6 9 7
9 1 7 3 8
1 8 9 4
Hard #5
8 9
2 9 1
8 4 5
7 1 9 8 2
5 3 2
4 8 3
9 7 5
4 1 6 9
1 6 4
Hard #6
6 9 7
7 5 8 6 2 4
4 9 8
2 7 5
4 6 9 7
1
5 2
6 1 2
7 9 6 8
Hard #7
2 1 4
8 7 5
4 6 9 8
7 4 6
8 6 3
2 1 5
6 3 8 9
2 4 1
2 6 5
Hard #8
5 3 1
1 4 6
4 5
2 1
6 3 1 2
5 9 4 1
5 6
6 3 2 7 5
2 1 9 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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