Printable Hard Sudoku

Set 13phn9j. 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
7 2 3 6
4 6 1 2
6 5 8
7 1 2
3 8 4 1
2 5 7
6 4
9 5 3 8 6
Hard #2
6 8 2 9
8
1 2
5 7 3
2 4 7 3 9 1 5
3 4 6
7
7 4 9
9 3 6 5 4
Hard #3
4 6 2
2 7 6 4
4 3
1 6 5 7
3 7 1 5
5 3 1
5
9 8 2
7 2 6 8 1
Hard #4
1 3 4 8
4 6 9
2
3 4 5 7 2
5 9 3
9 1 8 5
7 8 3 1
1 6
9 7 2
Hard #5
4 5 8
5 2 9
6 9 3 8 7
5
8 6 5
2 3 9 5
5 1 2
7 1 4 6
8 1 4
Hard #6
6 1 2 5 7
5 8 4 9
6
5 4 1
3 1 2
4 3
9 3 7 5 6
7 4 8 1
8 3
Hard #7
3 6 5 8
5 3 8
4 1 3
1 6 4
3 5 2 1
3 7
8 3 5
7 4 2 6 1
3 7
Hard #8
7 2
9 8 4 1
9 6
3 4 6 8
5 4
7 2 5 3
8 1 5
6 1 2 7
7 6 9 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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