Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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