Printable Hard Sudoku

Set bh0dlo. 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
6 3 8 2
9 7
3 5 4
6 9 4 2 1
8 3 1 6
1 9 8
3 9
7 2 1
4 6 5
Hard #2
7 2 4 3
2 7 8
1 5
3 5 8 9 7
5 4
7 1
1 6
9 2 5 1 8
7 2 9 4
Hard #3
9 2 3 8
7 8 1 6
4 2 9
3 8
5 2 4
9 4 2 3
2 5 8 6 9
4 5
1 6
Hard #4
9 6 2
7 5 4
4 3 7 2
2 9 3 1
1 6
1 8 5
7 1 4
2 1 3
5 7 9 6
Hard #5
6 5
5 3 2 4 9
7 2 1
1 4 3
3 4 8 5
5 9 3
1 8
4 2 6 9 3
7 9
Hard #6
6 8
9 8 4
4 2 6 8
2 6 5 1 9 7
1 9
5 7 1
9 2 4
1 9
6 5 8 7
Hard #7
6 9 2 1
5 3
2 1 9 5
1 6 8 5
8 4
9 2 3 1 6
3 1 4
6 7
4 3 2
Hard #8
1 5 2
4 6 3
2 9
7 5 4 1 9
3 4 7 8
8 2
3 8 7
5 1 7
9 3 5 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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