Printable Hard Sudoku

Set ju1fb. 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 8 6
3 6 2
2 1 8 7 4
2 7
1 8 5 9
3 4 5
6 4 8
7 9 3 8 6
4
Hard #2
3 7 8 5 4
6 8 3 9
4
6 3 9 1
9 4 6 8
2 5
7
8 4 2 9
6 1 9 5
Hard #3
8 6 5 1
9 7 8
4 3 2
3 9 2 4
3 7
2 6
6 7 5 8
5 7 6 3
1 8 4
Hard #4
2 7 4 1
3 4
4 6 5
8 1 3 9
2 8 3 4 5
9 7 5 8 6
3
8 7
1 6 4
Hard #5
9 3 2
5 8 7 4 1 3
9 7
6 1 2
2 6 9 5
3 4
7 6 8 2
8 5
5 3 9
Hard #6
9 7 3
3 4 8 5
7 3 4
8 6 1
4 6
9 1
2 1 8 3
4 6 8 2
5 2 3 4
Hard #7
1 7 3
9 4
5 2 1 3 4
7 6 3
6 2 5 7
1
8 9
7 4 1 6 2 8
6 2 5
Hard #8
9 1 8 7 6 3
7 2
5 8
3 9 1
4 1
2 7 9 6
6 2 3 8
8 4 3 1
4 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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