Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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