Printable Hard Sudoku

Set u63y97. 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
6 8 2 5
8 2 5 6
3 1 9
2 4
7 9 1
1 5 9 7
9 3 6 4
1 6 2 8
9
Hard #2
9 4 7
1 3 7
4 1 5
5 6
9 3
7 9 6 2 4 5
5 8 4
3 1 7 8
7 2 1
Hard #3
6 9 2
4 1
5 1 8 7 9
6 3 8
3 9
9 4 1 5
1 9 5
9 2 5 6
3 7 4
Hard #4
3 6 8
8 1
3 2 9 7
8 7 2 5
2 7 9 1
5 6 4 8
1 2
2 4 5
3 9 8
Hard #5
8 6 9
9 3 2 8 5
4 8 6
1 6
8 7 4 1
6 2 9
1 4 8
9 8 3 2
7 8
Hard #6
7 9 3 4 8
2 9
1 5 7 2
3 2 4 5
7
9 1 3
2 4 5
4 3 8 9
5 1 3
Hard #7
4 5 2
2 5 9 8
8
4 7 6
7 9 4
4 2 6 1 9
6 3 4 2
3 9 4 1 5
9
Hard #8
8 5 1 6
7 8 9 1
8 7 1 9
6 3
3 4 1
4 1 2 6
7 8 5
5 7 9 4 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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