Printable Hard Sudoku

Set mf0c4h. 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 8 1 9 2
8
4 9 7
9 1 2 5
7 6
4 3 1 9
2 4 6
9 8 5 6
5 7 9
Hard #2
8 3 5
7 5 2
3 7 9 8
5 6 1 4
4 3 2
1 2 9
8 3 7
1 3
4 7 1 2
Hard #3
9 2 7 5 1
9 8 2
4 8
8 3 7
5 4 3
5 1
2 3 9
3 7 1 6
4 7 6 2
Hard #4
4 9 6
3 7
7 5 3 2 4
9 2 1
8 1
7 4 2
3 8 2
8 2 7 4
5 4 8 9
Hard #5
2 1 8 4
9 5 2 1 8 6
3
8 7 4 6
4 2 8 5
9 8
9 2
6 2 1
7 3 1
Hard #6
5 1
3 9 8
6 2 7
9 2 6
7 3 1 4
4 7 8
2 6 8
2 1 4 5 9
4 3 5
Hard #7
5 1 8 6
8
6 2 4
5 2
6 5 3 9 8 7
9 1 6
9 3 5
6 7 1 3
2 3 1
Hard #8
1 9 3 4
6 5 9 8
7 6 5 4 1
3 6 1 5
8 9
3 9 1 8
8 3
2 9 7 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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