Printable Hard Sudoku

Set 50urqy. 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
4 9
6 8 2 5
9 7 5 3
5 8 6 1
8 6
8 3 2
3 8 1 2 5 6
9 1
2 7
Hard #2
6 5 4 2
8 5 6 7 1
3 7 4
2 1 3 7 9
5
5 4
6 9 1
1 8 5
9 3 8
Hard #3
7 8 5 9
5 9 4 1 6 7
6 7 8
9 1 6
1
2 5
2 9 4 7
8 3 4
7 9 8
Hard #4
8 3 5 4 9 6 2
4 7 3
3 2 7
2 8 6 3
7 3 8
9 3 2
4
2 9
6 9 1
Hard #5
7 2
6 7 2 1 8
3 8 7
9 1 8 4
4 6 9
5
1 6 9 7
6 3 1
2 3 5 6
Hard #6
9
1 5 3 4
3 5 8
5 6 7
1 8
9 1 5 3
6 2 5
5 8 2
7 2 5 3 6 1
Hard #7
6 3 7
7 9 2 1
8 3
1 6 2
5 8 7 3 2
9 5 6
5 4 3
2 7 5
7 8 1
Hard #8
8 2
9 5 6
3 7 4
8 6 3 1
5 7
7 8 2 3
9 1
6 1 3 9 2
3 2 1 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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