Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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