Printable Hard Sudoku

Set lglbe2. 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
2 4 9 5 8
4 5 1
8 2 3
4 1 3 9 7
2 6
7 9
8 6 9 2
5 9 1 6
4
Hard #2
3 1 7 5
4 8 5 9
9 7 5 2
8 4 6 7
9 3 8
1 2
3 8 2 5
9
5 6 8
Hard #3
6 8
9 8 1 7
5 1
9
6 5 9 4 7 2 3
3 1 5
9 1 3 5
4 3 2 8
6 7
Hard #4
7 8 3 9 2 4
4 7 8
1 9
4 1 5 9
6 3 5 7
3
4 7
4 5 8
2 8 1 9
Hard #5
9 5 8
3
7 8 9 3 2
3 4
1 9
2 9 8 6 5
9 1 5 3
5 6 2 7
3 8 9
Hard #6
6 4 8 9 1
9
7 8 9 4
8 7
1 7 9 4 2 6
4 3 7
2 5 8
9 1
3 2 9
Hard #7
4 8 7 2
1 9 6
4
2 3 8
7 1 5 3
4 5 7 6
1 2 5 9
7 8 3
5 6 1
Hard #8
2 7 4 5
9 2 3 1
3 6 2
2 5 1
4 7 9
1 8 3
3 5 2
6 5
6 9 5 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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