Printable Hard Sudoku

Set 1jbe02j. 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
2
6 3 1 5 8
1 2 4 5
9 7
2 8 3 6
5 1 9
9 7
9 6
3 2 9 1 4 6
Hard #2
9 6 4
6 4 1 7
8 7 3
8 2
2 8 7 5 1
3 4 5
4 2 6
1 8
1 7 4 9
Hard #3
7
9 5 4
3 5 6 8
1 9 3 5
5
7 3 2
3 5 4 1 9
1 6 2 7 4
7 9 8
Hard #4
7
7 1 9 5 6
9 4 6 3
9 2 8 5
2 9
5 6 4 1
4 6
4 6 9 1 5 7
1
Hard #5
7 8 5 4
6 2
5 4 3 2 7 1
3 8 9
6 9 8 7
6
5 2 7
2 8 4
9 8 6
Hard #6
3 1 6
7 8 1 2
9 6 5
8 4 6 1
4 9 3 5
7 6 9
1 7 4 6
8 3 2 5
Hard #7
2 9 1 6
5 1 7
1 7 5 4 3
1 2 9
2 3
6 7 3
6 8 5
3 1
8 6 9 2
Hard #8
6 4
2 1 9 6
6 8 5
6 5 4
5 9 7 2
9 1 8 3
8 2
6 7 4
4 3 2 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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