Printable Hard Sudoku

Set 1g5fqzz. 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
6 1 2
2 6 7 9 4
9
3 2 8 9 1
8 5 3
5 6 2
5 9 4 1
1 3 8
1 8
Hard #2
6 3
5 3 2 9 1
3 8 5 6
3 8 6
2
8 2 4 3
3 9 7 8
4 6 5
9 8 1
Hard #3
7 9
4 9 7
7 8 6 3
6 4 8 2
3
3 1 5 9 4
2 5 4
4 3 2 8 9
7 5
Hard #4
2 9 1 7
9 6 4 2 3
2 4 5
6 8 7
5 2 4
3
4 6 7 5
3 9 2
7 6 9
Hard #5
2 4
1 5 7 3 2
9 8 7 1
7 6 1 5
8 3 9
3 5 1
3 2
6 8 2 9
6 8
Hard #6
2 3
3 5 7 9 6
2 8 5
8 1 2
5 9
4 1 9 3 5
4 8 5
9 6 7 1
8 3
Hard #7
4 2
7 9 6 2 8
5 7 8 9 6
8 2 9 4
2 3 6
7 8 1 3
2 4 1
8 5 3
Hard #8
3 2
4 7 8 6
5 4 9 3
3 9 5 1 2
6 5
2 5 9 4 3
8 6
9 6 4
4 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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