Printable Hard Sudoku

Set 1e9tte3. 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 7 1
8 4 9
5 6 2
2 6 4 3
5 3 2 9
8 7 4
6 1 3
9 2
7 1 3 9
Hard #2
1 6
8 3 1
4 2 8 5 9
1 3 8
5 2 4 1
6 3 4 9
2 4 1
1 7 3 4
3
Hard #3
4 2 6
3 5 2
1 8 3 9
7 1
4 6 3 7
6 8 5
7 9 2
3 8 4 5
9 7 4
Hard #4
5 8 3 9
6 7 4 5
4 1
7 2
4 3 2 1
9 5 4 3
6 7 5 3 1
3 6
8 2
Hard #5
5 8
7 1
4 2 7
9 8 3
3 2 1 9 7
6 4 1
6 1 5
4 3 7 2 8
7 9 3
Hard #6
2 4 7
6 2 9 3
8 6 4
3 2
6 4
3 5 6 8 2
5 3 9 8
9 7 2 6
1 3
Hard #7
1 5 4 9
2 5
7 8 9
7 8 4 1
1 7 3 6 2 9
6 8
3 4
6 9 2
1 3 7
Hard #8
4 2 9 8
2 7 3
6 5 9
6 1
9 3 7 4 5
2 7 3
9 7 5
6
3 1 5 9 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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