Printable Hard Sudoku

Set v0s7qa. 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 7 5 3 6 1
9 8 4
5 3 4 1
9 5 1 2 7 3
6 9
8 7 6
4 5
9 2
Hard #2
9 4 8 5 1
1 9
2 9
6 4 9
3 4 9 7
2 6
4 1 6 5
6 8 7
9 3 2 8
Hard #3
6 7 1 2
1 6 8
8 9 6
9 2 4
3
6 2 8 3
8 3 1 5
7 1 6 2
6 5 4
Hard #4
4 6 5
1 5
5 2 3 8 1
1 6 7 2
9 6
6 7 8 1 4
1 6 4 9
9 3
5 3
Hard #5
1 4 7 9 6
3
3 2
6 1 2 8
7 5 8 4
8 4 5 7
9 8
4 9
2 1 8 7 4
Hard #6
7 3
2 1 5 9
6 1 8
8 9 6 3 5
7 5 8 4 1
2 4 7
9 1
3 2
5 4 6
Hard #7
9 3 8 6
1 8 4 9
1 7
6 8 9 5
8 2
7 5 6 3
7 4 1
8 7 5
4 8 6
Hard #8
9 3 1 5 6
5 6 9 4
1 8 3
7 9
6 4
1 2 7
6 2 4 1
2 3 9
8 4 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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