Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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