Printable Hard Sudoku

Set 1gqbx86. 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
5 8 3
2 5 1
9 8 1 5
3 9 2
8 3 9
1 9 3 8 5
4 5 9 2 7 6
7 1
Hard #2
3
5 1 4
7 6 5
9 5 6 8
1 8 7 2
6 4 9
7 8 4
8 9 5 3
5 1 7 9
Hard #3
9 7 8
2 3 8 6 1
9 3 4
5 7
5 2
6 4 3 9
4 7 9 2 6
5 6
6 3 1
Hard #4
7 2 8 1
7
9 6 5 4
6 5
5 1 2 3
8 7 5 2
4 9 1
7 9
3 7 4 8 6
Hard #5
8 4
6 1 9 8 4
5 1 2
9 2 3 6
9 7
1 2
5 3
4 7 2 9 8
3 2 8 1
Hard #6
9 7 5 8 6
6 9 5
1 3 4 8
5 1 8
6 9 2
7 1 5
2 7
7 5 4
2 7 9
Hard #7
4 9 7
2 3 1
6
1 6 5
4 3 1 8
2 5 1
8 6 7 2 1
3 5 6 4
7 6 8
Hard #8
1 6 2 3 7
4
7 4 3 9
7 5 1
3 2 4 9 8
2 5
7 9 1
6 1
8 4 3 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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