Printable Hard Sudoku

Set egvuh9. 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 4 2 5
2 7 6 8
8 6 2 4
3 9 6
5 9 8 2
6 8 1
2 3 1
6 7
9 2
Hard #2
2 3
6 8 1 5
9 8 7
1 9 8 3 2
8 2 5 1
7 3 8 6
8 5 3 9
1
3 6
Hard #3
1 2 5
5 8 4 6
6 5 1 8 4
9 7 1 5
2 7 6 9
1
7 6 8
7 3 5
3 1
Hard #4
4 1 9 7
2 9
7 4 2 8
6 3 4
6
9 2 7 8 6
3 5
2 1
3 1 2 8 6 4
Hard #5
1 9
3 7 6
2 9 3
1 5 3 9
2 5 4 6
4 9 7
7 8 6 4
9 6 2
1 3 8
Hard #6
4 7 5 2 1
1 8 5 3 9
1 6 8 4
6 3 9
5 9 1
9 2 3 8
5 2
6 1 4
Hard #7
6 3 7
2 6 4 1 3
1 4
8 1 2 4 9
9 2 6 1
7 6
9 1 3
2 7 9 8 3
Hard #8
9 2
8 7 9 4
4 5 1
3 4
9 6 8 7 5
5 2
7 2 8 1
3 2 7
2 9 1 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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