Printable Hard Sudoku

Set 1887bab. 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 8 7
7 4 1 5
3 8 2
7 5 6 8
6 4
5 9
2 7 3 6
9 1 8
7 6 2 3
Hard #2
2 5 4
3 5
4 6 3
9 1 4 7
6 8 2
2 4 9 7 8
4 8 5
5 7
1 5 2 4
Hard #3
5 4 7 8
6 9 5 3
3 9
9 7
4 5 1
9 1 2 6
7 8 2 6
4 2 6 7 5
1
Hard #4
5 2 6 8 4
9 4 1 5
4 5
3 2 9 6
7 4 2 3
9 6
2 1
6 8
1 4 3 7
Hard #5
6 8 3
9 3 6
3 4 1 2
2 4 1 6
5 8 2 7
1 8 4
4 6 1
2 5 3
8 9
Hard #6
1 5
3 7 8 6
1 4 3
2 6 3
8 5 9
5 9 8 2 6
2 4
9 8
7 8 2 1 3
Hard #7
6 8
1 5 3
9 2
1 9 2 8
2 4 6 9
6 3 5 2
5 8 4
2 1 3
3 9 5 6
Hard #8
9 2 4 6 1
3 2
4 7 1 3
3 4 5 9
5 8 2
7 6 1
1 2 6 4
3 9
4 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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