Printable Hard Sudoku

Set mq4qtv. 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 8 7 6 4 2
2 8
5 4 2 3
5 6 4
4 6 8
1 7 2
2 4 5
3 1
1 6 7
Hard #2
8 3 4 5
5 8 1 6
1 4
8
1 9 3
6 2 8
2 7 8 6 1
9 4 3 2
5 4 2
Hard #3
8 7 2 9
1 6
6 2 5 8 1
7 8 3
8 4 2
4 3 9
2 3 7
4 2 7
6 9 3
Hard #4
9 5 7 2
3 4 6
7 4 6 3 9
9 5 1
4
3 9 8 6
7
2 6 1 7
1 2 9 4
Hard #5
8 4 1
6 1 9 2
4 2 3
2 3 9 6
1 7 4
6 2 9
8 4 6 5
5 6 7
1 8
Hard #6
7 4 6 9 1
7 1
4 9 8
3 5 7 6
4 8 2
2 6 5 7
1 2 7 3 8
6 9
1
Hard #7
7 2
3
4 5 7 1 3 9
4 8 7 6 9
3 2 8
9 1 8
8 1 4 5
5 7
4 1 8
Hard #8
6 3 1
5 2 7
6 5 9 4
9 1 6
3 8 2
6 3
2 7 8 1 4 6 9
5
4 7 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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