Printable Hard Sudoku

Set qg83ka. 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 7 4 8
8 3 7
1 2
8 6 9 4
6 4 7
9 3 7
3 6 4
2 5
9 5 1 3 6
Hard #2
2 3 4
5 1 2 4
8 2 5
6 9 5
1 9 3
4 7
3 4 8 6 2
9 2
6 3 1 7
Hard #3
3 5 7
2 4 5
8 4 3 7
5
6 4 3 2
1 2 8 9
9 5 2 3
7 6 2
6 4 8
Hard #4
9 6 5 1
7 6 5 2
8 7
9 5
6 3 8 5
1 4
4 9 3 6
7 9 6
1 3 9 4
Hard #5
9 1 4
4 1 8
1 8 3 6
5 8 2
8 7 5 1
7 3
7 1 6 3
6 1 5 2 9
8
Hard #6
7 9
1 6 4
6 3 2 5
9 5 2 3 8
4 8
6 9 2
4 9 6
6 1 5 8
8 1 3
Hard #7
1 6 5 9
2 3 8 7 1
2 7 1 8 5
8 9 2
5 2 1
3 4
9 1 8
7 1
4 2
Hard #8
5 1
8 9 4
4 9 2 5
7 5 2 8
9 4 2 6 5
1 6
3 4 6
2 4 9 1
7 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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