Printable Hard Sudoku

Set vyte14. 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
7 3 2
3 1 4 9
4
4
7 8 2 4
6 2 5 3
3 1 4 7 5 6
5
4 5 7 9 2
Hard #2
4
3 2 6 9 5
8 4 6
5 2 8 7
3 7 9 4
1 3
4 6
4 3 8 7 1 9
1 8
Hard #3
8 5 2 9
4 3 7
1 8 6 7
7 2 1 6
1 4 2 7
9 5
9 6
5 9
6 3 7 2
Hard #4
5 7 8 3
4 8 9
7 9 4 1
1 5 4 6 2
6
4 3 9 5
5
6 1 3 7 5
7 8
Hard #5
6 7
4 9 1 6 2
4 8 7 1
1 8
3 2 6
8 5 2
9 1 7
2 3
5 6 7 9 2
Hard #6
6 8 4
5 3
8 6 2
4 1 6 9
2 3 5
5 9 2 1 3
7 2
2 4 8 9 6
8 3
Hard #7
4 3 5 7
7 4 1
2 6 8
2 8 7
9 7 4 3 6
7 2 5 3
5 9
1 7 4
3 2
Hard #8
8 6 9
1 2 7
3 1 5 2
7 8 4 2 5 6
3
1 9 8 7
6 9
9 7 6 2
2 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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