Printable Hard Sudoku

Set 106vj3s. 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
2 4 1 5 8 6
7 2 9 3
5 6 3
3 1 5 2
2 1 8
8 1
7 6 5
6 9 3 4
Hard #2
6 7
3 5
6 8 9 1
9 8
2 6 7 5 3
4 5
3 1 5 4 8
5 9 7 3 2
9 4
Hard #3
1 2 4 7 9 6
6 3
4 2 3 8
5
9 3 8 2
3 7
4 1 2
7 9 6 4
5 9 1
Hard #4
5 3 4
3 8
2 8 1 9 5
9 4 2
8 6 1 7
3 9
9 5
5 6 8 1
3 2 4 8
Hard #5
7 3 6
1 6 9
2 7 6 4
9 4 7 5
5 8 4
3 6 5 1 4
1 7 6 9
4 3
8
Hard #6
3 7
9 4 8 7
1 5
5 7 1 8 3
7 6
8 2 5 4 9
7 9 3 2 4
6 1 5
9
Hard #7
5 9 1
4
6 7 5 3
1
6 9 8 7 2
4 9
2 5 4
7 9 6 5
5 9 2 4 8 3
Hard #8
2 6 3 7
7 2 1 6
9 8 2
1 7 6 4 3 8
5
6 9 8
6 7 1
2 4 6 8
3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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