Printable Hard Sudoku

Set fu5g2v. 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 6 2 1
4 7 5
2 1 6 3
8 1 4
3 4 7 8 9
9
2
6 9 3 1
4 9 8 2
Hard #2
5 1
8 9 3 4
6 9 8
6 1 9
2
5 4 7
6 1 8 7 3
3 9 4 8 2
7 6 2
Hard #3
1 6
6 8 1 4 7 3
3 2
6 7
9 3 6
8 2 4 1
2 8
5 9 2
4 2 6 9 7
Hard #4
6 2 9 3
4
9 8 5 7
1 6 4 8
5 8 2 6
7 4 1
2 8 9 4
1 3 4
8 5
Hard #5
1 7 4
8 4 1 3
9 2 7
6 5 8 1
1 4 6
3 8 4 5 9
7 4 6
7 1
9 3
Hard #6
9 5 2
1
7 8 6
9 7 2
6 1 4 9
3 7
5 3 1 4
4 7 2 8
2 6 3 7 5
Hard #7
2 5
4 8 6 3
2 7 6 8
6 9 3 8
2 1 3
4 5 7
9 6 5 2
5 1 4 9
7
Hard #8
3 1 2 7
8 3
7 3 5 1
2 5 1 8 3
9 6
7 8 2 5
1 9 6 7
6 1
8 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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