Printable Hard Sudoku

Set x44fdl. 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
5 8 2 4 3
1 6
9 5
8 6 2 7
2 3 4 8 6
6 7 5
8
2 3 5 8
6 7 9
Hard #2
4 6 2 1
7 8 4
3 5 8
8 6 1
4 5 1 7
1 2 3
6 2 1 7
7 9
9 8 5
Hard #3
4 7 5
3 1 9 8
2 5 7
5 9 8 1
2 3 6
1
6 3
7 6 8 5 3
4 9 2 8
Hard #4
8 2 7
3 6 2
4 5
4 6 5
8 3 1 9
7 5 3
3 6 5 9 4 7
9 6
8 2 1
Hard #5
3 9
9 6 1
3 9 4
8 4 3 6 9
5 4
5 1 7 8
3 9 6 8 7 5
2
1 7 4
Hard #6
5 6 7 8 3 1
1 5 3 4
9 3 2
8 7 5
7 4
5 2
2 9
6 8 5
8 2 3 7
Hard #7
7 5 3 4 8 1 2
9 8
8 2 3
4 1 7 3
4 5 1 9
9 7
3 4
4 6
1 9 5
Hard #8
4 5
8 2
7 9 5 1 8
2 5 6
4 6 9
6 1 4 5
3 2 7 9
3 1 8 4
1 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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