Printable Hard Sudoku

Set 89v8ht. 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
1 8 6
7 3 9
3 2 5 6
7 8 9 6 1
4 6
1 4 3
6 5
2
5 2 6 1 8 3
Hard #2
5 7 3 9
7 6 5
3 6 1
4 9 1 2
3 8
9 2 3
6 1 9 8 7
5
8 2 1 6
Hard #3
6 3 8
3 9 4
8 4 9 3 5
8 2
9 2 7 6
1 7 6 4
9 5
3 2 6
8 1 9
Hard #4
5 1 6 8
9 7 1
7 2 9
9
7 8 3 2 9 4
2 5
5 2 1 3 6
6 8 9
3 4
Hard #5
3 1
9 2 8
4 9 6
3 7 6 8
2 4 1 3 6
4 7
6 5
9 7 3 1 8
2 8 7
Hard #6
6 2 7
3 4 6 8
2 3 7 1
4 5 8
7 5 2 9
9 4 3
3
6 8 5 2 7
8 1
Hard #7
1 8 7 5 3
7 6
4 7 6 1 5
8 5 1 2 9 6
5 3
6 4 3 5 1
2 1 9
6
Hard #8
7 5 3 6
8 5
6 4 5 3 2
8 5 7 1
4 7
1 8 9
5 6 3 4
3 1 7 6
5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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