Printable Hard Sudoku

Set 4f7fgb. 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 2 6
6 9
5 9 7 4
7 6
3 4 6 8 1
1 2 8
6 2 5
2 9 8 7
3 9 1
Hard #2
7 4 5 2
4 9 3 1
8 3
3 5 6
7 9 6 2 5
4 6 1
5
8 9 5
2 5 6 4
Hard #3
5
4 1 3
8 1 7 4 2 3
2 7 5
4 7 9
6 5 2
7 2 9 6
2 9 3 1
9 5
Hard #4
9 4 1 8
3
1 7
2 8
7 9 6 5 3
3 7 2 9
5 9 6 2
3 5 8 6
6 7 4
Hard #5
1 5 3 4
8 6 9 3
2 4 7 8
1 8 5
7 4
4 7 8
9 8 5 6
1 6 4
2 3
Hard #6
4 3 2 5
3 6 7
7 3
2 3 4 7
6 7 1
1 7 2 6 4
7 9 5 2
2 8
9 3
Hard #7
8 6 2
6 2 5 3
5 2 6 1
6 7
4 5 3 8 2 1
1 5 9
4 9 3
4 3 6 5
Hard #8
3 6 4 9 8
9 7
5 7 3 2 4
3 8 4
7 2
5 8 3
5 6
9 3 1 5 6
2 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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