Printable Hard Sudoku

Set bhboi9. 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
8 9 3
7 9 4
4 1 8 9
6 9 1
6 5 3
5 2 7 6 8
7 2
8 5 2
1 3 9
Hard #2
2 9 7 1 4
2 9 8 6
8
7 3 2 5
7 4 1
4 3 1 8
7 6 4
5 3 7 9
2
Hard #3
3 5 7
8 1 7 2 4
7 8 3
5 9 4 2
2 7
3 1
2 5 4
1 4 5 8
3 6 1
Hard #4
3 5 7 2
9 2 5
7 1 8 3
9 7 8 3 1
1 4
4 1
7
6 9 1 2
4 5 3 6
Hard #5
7
5 9 3
3 6 4
8 6 7
2 7 3 5
5 9 1 4 8
7 6 5
1 5 8
3 8 9 4
Hard #6
9 6
7 8
4 3 2 5 1
7 6 8 4 1
8 5 3 2
5 1
9 1
7 6
1 2 4 3 7
Hard #7
1 4 7 9
2 5 1 6
7 8
9 6 4 5
1 2
3 7
2 4 9 1
8 9 1 3 5
4 3
Hard #8
2 9
6 1 8 4
8 3 1
5 2 8
2 8 3 7
7 4 1 9
9 2 7 6
5
1 8 4 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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