Printable Hard Sudoku

Set w049ls. 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
4 7 9 8 6 3 2
9 6 3
7
3 5 2 7
9 1
8 2
6 4 9 8
1 7 5
3 6 2
Hard #2
9
3 5 6 1 4
1 8 3
7 8 2
8 1 6
6 5 4
7 2 5 8
6
5 9 6 8 2 1
Hard #3
9 1
6 5 7 9
7 9 8 2
3 5 4 6
4 9
2 6 3
3 4 8 5
2 8
4 1 3 2
Hard #4
4 7
5 7 2 9 8 1 4
4 5 9
1 5
8 5 3
8 4
5 9
8 4 2 3
4 3 7 8
Hard #5
3 5 7 6 4 9 8
2
8 7 1
9 4
1 7 4 5
7 3 6 1 2
3 4 2
8 3
9 2
Hard #6
4 7
4 7 2 3 8 5
3 8 2 9
1 3 5
5 9 1 3
6 3 7
8 6
9 5
4 1 7
Hard #7
8 2 9 6 5
8 3
6 3 7 8
4 1 9
5 8 4
9 4
9 2 4 1
8 3 9
3 7 6
Hard #8
8 1
6 3 7
4 2 3 5 1
1 9 7
6 2
9 5 1 3
2 4 7
9 1
7 6 8 3 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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