Printable Hard Sudoku

Set k6swz. 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
8 5 9 4 6
5 8
9 7 3 2
9 1 4 5 7
5 6
1
6 1 8 4
4 2 1
3 2 7
Hard #2
6 7 1 9
9 2 7 1
3
3
2 5 9
8 3 6 2
3 8 6
8 9 7 5 2
1 5 2 7
Hard #3
7 3 6 8 4 1
4 3 2
2 6
5 3 1
3 1
7 5 9 2 8
4 7
1 7
9 2 5 1
Hard #4
6 1 4 3
3 8
5 2
4 5 2 9
1
6 4 8 5 7
9 7
9 8 1 7 5
7 8 1 3
Hard #5
6 7 1
2 5
9 5 7
3 9 2 6
6 7 1
7 8 3
2 1 9 7
4 5 2
1 7 9 5
Hard #6
7 8 5
3 2 9 8
4 7
2 8
2 3 4 5
8 9 1 7
7 2 9 6
8 3 5
5 6 2
Hard #7
4 7
4 8 3 7 5
1 3 2
5
3 4 1 6
6 5 9 3
8 7 6
9 1 6 7
6 2 9
Hard #8
8 3
4 2 9
3 8 2
8 5
1 3 9 5
2 7 6
1 5 4 6 2
9 3 6 7 4
1 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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