Printable Hard Sudoku

Set 15774kf. 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
9 4 3
5 3 6 8
3 5 6 4 8 2
6
9 4 3 1
7 4 8
6 7 1
7 5
4 2 5
Hard #2
5 3 9
6 2 7
6 9 7 8
2 7 8 1 9 4
4 3 5 2
5 8
6 1 8
6 2 8
9
Hard #3
4 2 7 9
4 1
5 3 4
8 7
6 4 9
6 3 5 8
7 5 8
9 6
1 9 6 4 3 5
Hard #4
2 6
1 7 3
1 6 5
4 6 3 2 1 9
2 4 1
5 2 7
3 9 5
1 7 3 2 4
3
Hard #5
5 7 3 9 8 2
1 9
4 3
2 7 6 9
2 8 6
5 3 9 4
6
9 3 4 5 2
7 8
Hard #6
8 1 4
1 4 5 3
2 8 9
9 4 8 7
3 7 5
2 3 4
6 4 3
7 1 2
9 7 8
Hard #7
2 1 6 3 5 9
5 2 8 1
7
3 6 8 7 5
6
2 1 9 3
5 2 8
6 7 9 1
1
Hard #8
3 8
6 4 5
4 7 1 2
3 4 1 7
5 2 1
7 9
7 6 4 3
2 8 5 9
6 8 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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