Printable Hard Sudoku

Set sgdir9. 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 4 8 9
8 2 7
4
7
8 1 6 5
2 7 9 1
6 3 1 4
9 2 8 3 6
6 3 4
Hard #2
7 9 2
1 3 7 4
8 2 7 3
6 7 2 1
9 3 4
2 8 6 5 7
1 5 8
9 8 2
Hard #3
3 6 9 4 5
2 1
9 1 3
2 7
8 6 7 5 4 3
7 2 5
5 7
3 8 6
9 1 8
Hard #4
6 5 7 8
9 6 8 2
8 1 7
4 9 5
7 1
4 3 9 6
8 3
2 5 3
7 3 2 1
Hard #5
7 4
8 1 5 6
4 9 6
1 3 5 8
8 6 3
9 5 2
5 3 7
7 9
6 7 4 9 1
Hard #6
1 8 3 7
3 2 5 8 6
2 5 9 6
9 5 2
5 3 1
9 6 2 8 5
5 7 2 9
1
Hard #7
5 7
8 9 6
2 4 5 9
7 3 5 6 2 1
9 8 4
2 1
1 6 4 7 3
8 7
2 6
Hard #8
3 6 7 4
2 3 9 8
5 9 6
2 6 7
7 4 2
1 6 2
7 9
9 2 4 8 6
6 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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