Printable Hard Sudoku

Set lx4nbq. 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
3 5 7
1
5 2
5 8 6 3 7
6 9
1 4 5 9 6 3
5 7 4
8 4 9 7
9 3 6
Hard #2
5 8
1 3 9
2 9 8 4 7 3
4 2 5
7 3 4 6
3 6
6 3 9 7 1 8
1 5
9
Hard #3
2
5 9 2 7
8 5 3
4 8 1 7
3 6
7 1 4 6
1 7
4 5 8 3 9
2 7 5 8
Hard #4
2 7
5 3
4 6 2 1
9 6 5 2 7
3 8 9
8 1 9
5 3 8 2
1 4 6
6 1 3
Hard #5
6 2 3
7 4 2
5 3 9
4 1 5 7 2
5 9 3
9 3 2 1
7 9 5
6 8
4 1 3
Hard #6
7 6 4 9
1 9 2 4
2 7
2 3 7 6 5
2 3
3 5 6 9
8 7 1 6
3 9 4
9
Hard #7
1 4 6 5
5 6 1
6 9 7
7 8 9
3 5 6 9
1 2 3
9 4
9 2
2 4 3 5 7
Hard #8
2 7 4 9
1 8 7
5 8 2 1
3 7 4 1 6
3
9 6 8
9 1
9 2 3 6 8
2 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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