Printable Hard Sudoku

Set 1xguw5n. 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
3 1 6
2 4 8 1 7
1 6 4 3
8 7
9 8 6 2
3 7 9 6
7 5 4 8
9
6 3
Hard #2
4 7 1
6 1 8 5
8 4 9 7 3
4 6
5 4 1
1 3 6 9
2 3
1 7 8 2
8 9
Hard #3
2 3 8 1
3 1 5 6
8 5 2
9 3 4
8 9 2
1 7 6 5
6 9 1 7
8
8 5 6
Hard #4
3
5 7 6 4 1
8 6 3
1 8 2 7
2 4 7 8
6 7 8
6 7 3
9 8 5
5 2 1
Hard #5
2 9 8 4 5
4 5 1
8 1 2 7
1 2
5 7 6 1
6 5 4
3
8 7
6 8 5 4 7
Hard #6
8 1 7 2
2 9
5 4 8 1 7
7 4 5 6
6 8 7 9 2
6
2 4 8
9 4 1
7 3
Hard #7
5 9 8 1
4 7
8 5 7 6 9
5 1
1 9 3
2 8 6 1
3 2 8
7 8 3
5 8 6
Hard #8
4 3
9 1 7
6 5 8
2 4 8 1
7 8 3 4 2
3 4
4 6 5 1
8 1 3
6 9 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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