Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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