Printable Hard Sudoku

Set 5t194. 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 1
9 7 1
1 3 7 6
3 9 7
4 6 5 3
1 8 6
8 5 2 4 3
7 5 2
4 9
Hard #2
8 5 4 2
6 7 8 1
1 2 3
1
3 6 4
6 8 3
5 3 9 1
9 2 5
1 5 2 7
Hard #3
8 4
5 2 4
9 6 1 7 8
3 7 5
6 2 9
8 4 5
2 3 5 8
7 8 1 6 9 5
Hard #4
6 5 3
8 9 2 3
8 5 6 7
7 3
9 8 7 5 1 2
1 7
7 2
1 3 6
1 2 9
Hard #5
5 2 9 3
4 1 5
9 5 4
7 2
2 4 6 7
6 4 7
5 8 4
3 4 7
9 1 2 3
Hard #6
7 3 5
3 4 2 1
8 3 4 9
7 1 4 9
6 5 1 2
9 6 3
5 8
4 5 8 9 1
Hard #7
4 8
9 6 1
9 1 5 2
7 3 4 5 1 6
5 8 7
3 6 2
4 6 8
4
7 2 4 9
Hard #8
6 2 9
7 5 2
4 5 1 3 7
1 2
8 6 3 4 5
1 6
5 7 4
5 3
1 9 4 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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