Printable Hard Sudoku

Set x73u4e. 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
4 2
9 6 5 1
8 7 4 3 6
8 4 6
9 3 6
1 4 7
5 6 1 4
2
9 6 7 2
Hard #2
5 4
7 2 9 6 5
4 1 9 3
7
5 4 2 8 9
1 8
3 5 7 8
1 5 4
5 9 3
Hard #3
7 6 8
8 3
3 1 8 6
6 5 1
4 1 2 5
1 4 8 3
2 3 7 8
4 5
6 3 7
Hard #4
7 4 5 3 1
1
8 4 3
2 7 6 9
6 1 8 4 2
9 3 5
1 9 3 2 8
6
8 7
Hard #5
5 4
6 2 8 4 5
7 5 6
8 1 6 9
5 2
2 8
1 5 2 8
9 7 6
2 4 7 1
Hard #6
8 7 1 5
2 9
8 2 9 4 6
4 8 2
6 5 3
7 9 4
1
5 7 8 6 2
1 2 5
Hard #7
8 2 3
7 5 3 4 9 8
2 1 3
3 5 9 4
1 9 7 8
4 7
9 6
6 7
1 6 8
Hard #8
2
1 7 8
9 4 5 1 3 7
2 9 8 5
5 6 9 3 4
8 6 9
5 3 2
1 7 9
1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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