Printable Hard Sudoku

Set y8yzv8. 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 6 5 2
6 4 5
3 9 7
8 5 2
2 3 9 8
5 8 1
2 9 6 3
9
5 2 4 8
Hard #2
8 1 9 5
9 8
6 2 5 3 9 1
6 5 9
6 2
4 8 1 7
8 2
3 1 6 2
6 3
Hard #3
8 2 1
6 9 7 8
3 6
7 1 6 8
6 2 4 1
1 5 3 4
2 8 3
3 7 4 8 2
Hard #4
2 3 7
4 7 9 8
8 3 6 4 9
5 8
1 6
2 9 6 3 5 7
2 1 6 7 9
4
3
Hard #5
8 5 4 9
3 5
1 7 8 3
8 9 4 5 2
2 6
6 4 7 9
5
9 5 2
4 6 7 3
Hard #6
1 8 6
4 5 7 1 9 3 2
2 5 1
9 2 6 7
4 8 2 7 3
6 8
3 5
4 6 9
Hard #7
3 2 1
6 7 4
7 5 1
7 4 1 9
4 2 3
3 7 6
6 3 9 8
4 3 7
5 7 2
Hard #8
9 2
3 6 7 1
6 1 3
4 3 5
5 7 3 6
1 9 2
6 9 1 7
6 4 5
5 2 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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