Printable Hard Sudoku

Set lgyfe2. 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 3 5
2
5 6 4 1 7 3
2 4
4 8 1 3
7 6 8
9 5 8 4 2
8
6 4 7 3
Hard #2
3 6 2 4 1
9 1 8
9 8 3
6 3 4 9
7 5
4 1 8 2
8 6 9 7
1 3
5 2
Hard #3
4 3 9
9 6 2 3
5 1 9 6 2
1 6 4 7
3 7 8 6
2 8
6 9
9 3
5 4 1
Hard #4
3
1 8 2
4 2 3
9 2
5 7 8 9 1
9 7
3 2 1 9 5
5 4 6
7 1 3 8 2
Hard #5
4 2 9 7
8 3 6 1
6 7 3 8
4
3 7 9
1 2 6 4
1
6 4 2 5
8 7 2 3
Hard #6
3 2 6 7 5
5 9 2
6 7 5
2 1 8
3 6 8
8 3 7 5
8 4
1 7
6 2 7 1
Hard #7
7 3 2 9
4 1 9 7
1 6
4 7 1 9 6 5
8 6 7
7 2 3
6 1 2
5
3 6 9
Hard #8
1 3
4 3 7 6
3 2 6 4 5
1
6 3 4 9 5
7 4
2 7 1 8
1 3 9
8 2 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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