Printable Hard Sudoku

Set buu7oj. 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 4 8 1
9 5 6 4
4 7 3 9
6 2 5 8
1 6 3 7
8 4 5
7 3 5 9 6
9
Hard #2
5 1 6
8 4 5 7
8 1 6
2 7 3
6 3
9 1 2
1 9 6
3 4 9 5 2 8
6 8
Hard #3
8 5
9 5 7 2
6 3 9 4
2 8
3 6 7
3 9
8 4 5 7 3
3 8 6
2 5 9 4
Hard #4
6 9 2 5
5 9 1 8 6 2
4 6 7
3 9 2
7 6 9 1
9 5 4 8
3 7 4
8 3
Hard #5
1 4 2 3 5 8
3 5 2 1
2 1 3
9 8 2 5
1 5 8 7
3 8 2 9
6 4
9 6
Hard #6
1 4 5
3 4 2
6
2 3 7 5 8 4
8 5 2 4 7 1
7 6 9
6 4 3
3 5 1
9
Hard #7
7 1 5 6
3 2 8 1
6 7
3 8 2
8 9 7 3
2 6 1
1 8 9 4
2 4 8 9
9
Hard #8
4 7 2 8
8 3 9 4
3 6 7
5 9 3 2
3 8 9
4 6 5 1
8 6
1 3 6
7 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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