Printable Hard Sudoku

Set 1l98lnm. 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 6 2
8
6 3 9 4
7 9 3 6
2 5 7
5 1 9
8 7 9 1 2
1
7 9 4 8 2
Hard #2
1 6
9 8
8 9 6 5 4
4 1 2 8 7
1 6 9
5 4
4 9 8 3
9 7 1
3 4 5
Hard #3
6 9 8
4 5 6 7 9
1 5
5 2 4
7 6 9 1
3 4 6 5 7
1 3
4 3 5
8 4
Hard #4
3
4
5 6 1 2
7 9 3
2 9 5 7 3
5 1 8 9
9 8 5 2 7
6 1 3 5
3 8
Hard #5
2 7
5 6 2
4 6 8
7 3 4
8 3 6 4 1 9
2 7 8 1
5 9 2 4
1 5
7 9
Hard #6
1 3 2 8
5 8 7
7 9
7 4 9
3 9 5
5 8 1
2 4 7 5
8 5 2 3
9 1 4
Hard #7
7 5
4 6
9 2 3 6
7 6 3 2 1 9
8 5 2
3 7
6 8 9 4
4 9
7 4 6 1
Hard #8
5 6 3
8 3 1 4 9
2 9 4 3
8 4 7
3 8 6 5
2 4
7
9 5 6
4 9 1 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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