Printable Hard Sudoku

Set 1tul0wz. 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
3 6 8
4 2 6
5 2 7 8
8 1 6
4 9 6
2 9 1
8 1 5
7 4 3
3 1 2 9
Hard #2
8 6 2
5
7 9 8 4 1 5
1 8 4 3 5
9
6 4 1
4 5 7 1 8
2 3 1
1 9
Hard #3
6 1
7 3 8
8 7
3 2 6
6 8 2 5
6 4 3 1 7
4 6 1 8 3
7 2
3 2 4
Hard #4
1 8 9
3 2 6
6 4
4 2 6 7
9 7 5 8
5 2
1 4 2 9
4 1 5
8 3 5 2
Hard #5
6 1 2 7
3 2 9
1 4
8 1 9
7 6
4 9 7
2 8 9 7
5 9 3 4 6 8 2
1
Hard #6
4
5
5 1 8 4 6
2 9 5 3 1
7 4 6 8 5
8 7
9 2 3 6
6 8 7
5 7 6
Hard #7
9 5
8 7 1
4 2 8
1 6
7 8 6 9
6 1 5 9
7 5 4 9
4 2 1
1 6 4 2
Hard #8
4 7 9
7 8 4 2 6 5
3
5 9 8 4
2 6 8
7 3
1 2 6 5 7
3 2 6
1 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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