Printable Hard Sudoku

Set ou0xez. 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 3 2 1
6 3 8 7
1 4
4 7 3 2
7 3 8 1 4
8 5 7
4
2 3 6
4 9 2
Hard #2
8 3 4
3 2 6
7 4 2
6 1 9
1 5
7 4 1
8 7 5 6 3 4 1
4 5 7
1 4
Hard #3
6 3 5
1 7 9 8
9 4 1 8
6 1 5
3 1
2 1 3
2 9 7 3
5 4 2
7 4 8
Hard #4
5 1 3 2
6
9 2 1 6 8 5
9
9 7 5 6
2 8 6 5 3
7 5 4
8 2 3 1
9
Hard #5
4 8 7 6
6 4
9 2 4
5 8
4 1 9 3 2
2 8 3 5
2 3 5
9 7 2 4
1 9
Hard #6
9 6 4 8
1 5 6 3
3 8 4
6 1
3 1 9 4
7 5 6 3
2 3 7 1
5 9
3 8
Hard #7
1 4 2 5
6 7 8
5 9 3 4
2 4 1
3 8 4
1 3
5 3 2 8 1
4 3 6
3 9
Hard #8
2 8 6 4
4 2
4 2 6 9 7
6 1 3
1 4 7 5
5 1
3 9 4
3
7 8 9 1 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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