Printable Hard Sudoku

Set hy1mzr. 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
3 7
1 3 8
8 2 4 9
7 2
1 6 9
6 9 5 8
6 5 3 1
1 8 9 7
7 2 3
Hard #2
2 4 9
1 2 9 5 8
5 6 1 2
6 9
1 8 6 4
4 9
8 2 5 7
3 8 7 4 9
Hard #3
3 8 2
1 9 2 5 6
7
1 6 8 4
3 1 4 7
2 3 8 9 5
8
7 5 1 3
5 4
Hard #4
3 4
5 7 2
2 4 1
9 1 8
3 2 7
4 7 6 2 9
2 8 7
9 3 5 4
4 6 2
Hard #5
4
3 1 7
6 8 4 9
8 9 2 1 7
5 3 7 8 6
7 5 3
2 4
1 4 9
3 9 2
Hard #6
7 5 4 8
9 6 7 4
1 7 3 5 9
6 7
9
8 1
6 8 5 7
9 6
5 2 3 7 8
Hard #7
3 1
5 6 8
7 1
4 7 8
9 5 3 4
1 4 3 6 2
4 2 6
1 8 6 4 9 3
7
Hard #8
8 3
4 1 6
8 2 6 4
6 2 7 5
3 7
5 4 2
9 1
8 6 3 1
9 1 2 8 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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