Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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