Printable Hard Sudoku

Set 94wq3g. 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 5 4
8 6
5 7 9 4 2
7 3
8 5 9
6 2 8
1 3 9 5
5 3 1 6 8
8 4
Hard #2
8 3 2
1 9 7
3 5 9
4 9 5 7
6 5 1
9 5 2
6 1 9 5 3 7 8
8
5 1
Hard #3
7 5 6 8
2 7 9 5
9 4 7 2
3 6 5
2 6 1
3 7 8
6 1 7
5 8 7 6 9
Hard #4
8 2 6
7 9 3 2
1 7 9
2 4 6 8 5
9
5 7 2
8 7 1 3
5 8 3 9
2 5
Hard #5
3 5 7 1
4 1 8
1 3 6
8 9 2 5
4 9 3
3 5 6
5 4 8 2
7 1
6 9 8
Hard #6
4 5
8 9 6 2
2 1 7 9 8 4
7 4 6 9
6 5
2 7 3
5 2 6
9 4 1
8 7
Hard #7
2 4 8 6
5
9 7 3 4
4 1
8 6 2
9 1 2 5 7
4 8 3 1
5 9
7 5 2 8
Hard #8
9 5 7 1 4
3 5 7 8
1
4 8 7
7 9 2 1
4 5 9 3
8 6 5
9
3 1 6 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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