Printable Hard Sudoku

Set 1meqs2d. 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 2 5
9 1 5 2
4 3 7
8 7 1 4
3 5 1 2 8
4 8
4 3 7
9 3 6
4 5
Hard #2
6 2 7 3
5 9 4 8
1 7 2
4 7 3
5 9 6 4 8
7
7 4 2
6 1 5 3 8 9
Hard #3
1 3 8 2 9
4 9 7
8 4 7
2 1 9
6 3 4 1
5 1 8
7 3 4 6 2
9 7 6
Hard #4
1 2 8
3 8 5
9 3
8 5 7
7 9 3 1
5 2 9 8
5 6 4
4 7 6 2
1 6 7
Hard #5
6
5 9 2
7 6 1
2 3 7 4 6
1 4 6 2 5
9 8
5 9 7 2 6 1
3 8
3 5
Hard #6
4 9 6
6 3
1 9 8
2 6 7
2 7 5
8 4 3 5
7 4 1
5 4 3 1 9
9 5 8
Hard #7
2 4 1
4 7 5
6 5 4
2 1 5 3
9 8
8 2 6
9 4 2
3 5 2
4 9 3 6 5
Hard #8
7 6 1 3
9 1
6 9 7
8 4 3 2
5 4 6 8
1 7 5 8 9
3 2 7
3 5
2 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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