Printable Hard Sudoku

Set 11wt8nb. 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 1 7
5 7 8 2 6
3 1 5
3 6
3 9 4
5 8 2
8 4 1
6 8 5 2 3
9 4
Hard #2
5 9 8 2
3
2 8 1 7
1 7 5 8
2 5
5 3 4 9
3 1
8 1 3
9 6 3 7 4
Hard #3
7 9
4 8 9 7 3
3 1 9 5
1 9
1 6 8 4
6 2 5
3 2
9 5 8 4
6 3 8
Hard #4
8
8 7 5 6
1 3 9
9 7
3 5 8 4 6 1
1 6 2
1 9 2
2 6 5
9 7 8 5
Hard #5
5 7 2 1
8 4
2 4 1 6
1 4 2 3
6 7 9
6 7 5 8 9
4 1 2 3
9 2
8
Hard #6
7 4 2 8
3 7 5
8 4 3 6
8 6
3 2 1 5
3 7 4
9 3
2 1 5 9
7 9 1
Hard #7
9 8 2
6
3 6 2 9 5
6 4 3
9 3 2 7 8 1
8 2 3 9
7 5 2
4
2 1 5
Hard #8
7 5 9 8 1
8 2
8
8 2 7 6 5 4
1 9 3
7 6
9 8 7
5 3 6
3 5 1 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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