Printable Hard Sudoku

Set 1ojbe86. 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
5 6 9
2 6 8 7 1
3 9 2 1
6 3 5
5 1 9
8 2 7
7 9 2 5
6 1 4
Hard #2
8 5
2 3
4 3 8 1 6
6 1 4 5
7 5 9 3 2 8
1 9
4 1 2
1 2 8 4 5
Hard #3
4 7 2
8 4
1
5 8 2 4 7
3 7 5 2
3 5 1
6 3 2 1
2 8 6 3
3 4 6
Hard #4
4 7 8 6 3
5 7
1
9 1 8 5
2 6 9 7 4
4 7 9
6 9 2 7
8 2 6 4 5
Hard #5
7 8
9 6 1 4
6 2 4
7 2 4 6
8 1 3 4
8 7
3 9
4 1 9 7
2 1 5 8
Hard #6
4 5 3
9 3 8 7
9 6 4
4 9 3 7
3 6 2 1
2
8 6 3 1
2 7 1 9
8 5
Hard #7
2 4 6 9
6 1 9 3
1 5 4
7 1 8
5
7 3 9
4 6 1
1 3 8 4 9
4 6 2
Hard #8
9 8
1 2 3
6 1 4
5 3 8 9
7 2 5 3
3 9 6
6 1 8 2
1 3
8 2 5 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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