Printable Hard Sudoku

Set 11n9wt2. 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 9 8 5
9 4 6
1 6
5 4 6
1 5 8
8 9 2
3 9 7
6 3 9
9 5 7 1 6
Hard #2
3 5 2 4 7 9
5 7 4
4 3 6
4 6 3 9
1 4 3
2 9
5 8 7
8
4 1 3 2
Hard #3
3 4 2
4 5 6 8
5 4
2 7 3
6 3
8 1
3 8 6 4 1
2 9 5 8
5 4 8 9
Hard #4
3 6 1
4 5 1 7 8
7 5
3 9
1 7
8 3 5 4 6
4 2
8 5 7 9
2 1 9 8
Hard #5
3 8
8 1 6
4 2 9 7 3
9 6
8 5 4 9 7
3 1 5
2 3 8 4
2 7 9
6 1
Hard #6
8 6 1 5
5 9 1
7 3
2 5 3 1
1 6 8 4
8 9
8 7 6
5 2 3
3 4 5 8
Hard #7
5 7 8
8 2 7 4 6 3
4 1 9 5 7
2 9
9 3 2 4
1 5
7 5 2
1
3 2 6
Hard #8
4 5 2
1
8 2 9 3
6 7
3 5 8 2 9
4 9 3 1 8
6 5
2 1 8 9
1 7 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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