Printable Hard Sudoku

Set 1yxkr0b. 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
3 4 8
1 7 4
1 3 6
4 5 6 9 8 3
2
2 9 1
3 4 1 9
8 4 6 5
5 9
Hard #2
9 3 7
1 3
6 7 8 4
4 8 2 6
7 5
6 1 2
4 6 3
2 5 7
3 9 8 6 2
Hard #3
5 9 8
1 5
4 3 2
6 4 2
8 5 1 3
4 8 5 7
8 4 1 3
9 5 2
7 5 3
Hard #4
5 1 8 3 7
3 8 4 2 6
9
8 9 2
3
4 5 7 8
6 8
2 4 3 6
6 5 4 1
Hard #5
2 3 1
9 6 8
5 1 6 4
7 6 8
9 5
1 2 9
4 5 8 6
7 6 1 9
2 7 5
Hard #6
9 5 1
3
2 4 9
5 4 9 8
7 1 2 3
9 8 2
8 6 9 4
3 9 8
4 7 8 2
Hard #7
9 3 1
4 9 1
5 9
9 4 3 5 7
5 6
3 1 2
1 9 8 3
1 5 3 6 4
8 6
Hard #8
7 8 1 4 9
4 6
1 3 2 7 4 5
7 1 6
9 3 2
6 8 7
4
3 5
3 4 2 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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