Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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