Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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