Printable Hard Sudoku

Set 1j0r5bn. 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
1 8 9
7 8 9 5 4
5 1 6 2
9 1 2
2 3
2 5 3 4 6
8 4 7
3
2 6 9
Hard #2
3 4 8
6 9
4 2 8 6 1
5
1 4 9 2 3
6 9 2
5 2 7 3
3 6 5 9
1 3
Hard #3
1 4 5 3 6
2 3 9
2 3 7
3 1 9 4 2
4 6
2 4 8 6
5 9 7 6 1 3
9
Hard #4
1 6 7
2 9 5
9 6 7 3
5
1 7 8 3
7 8 4
8 5 1 2
6 4 3 7
7 1 4
Hard #5
7 9
6 7 1 4 3
9 8 1
7 6 2
8 5 1 2
4 3 5 8
2 4 6
9 3
9 4 8
Hard #6
4 7 1
8 3
1 4 2 8 5
5 2 8
7 1 5 8 6
6 1 3 7
7 5
6 4
9 1 2
Hard #7
7 3 6 1
8 4 9 7
3 1 8
3 6
1 4
9 5 4
4 5
6 2 5 4
9 2 8 1 3
Hard #8
3 5 9 6
3 9 7
5 7 4
1 7 2 5 8
7 8
9 4 1 7 3
2 4 3 9
6
8 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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