Printable Hard Sudoku

Set 14mfl73. 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
7 4 5
8 1
2 4 6 8
1 4 8 3 6
6 1 9 4
5 2
8 2
6 1 7 8 9
6 9
Hard #2
8 4 2 6
6 5 9 3 2
7 4 9 8
9 8 3 4 5 2
5 6
8 7
5 1 9
2 1
3
Hard #3
3 7
1 2 6 8
2 4 3
3 8 5
4 2 9 1
9 5 1 3
5 2 4 9
7
3 6 7 8
Hard #4
4 1
1 8 2
9 2 6 5 7
1
8 2 5 3 6 4
5 6 3 1
7 4 2 6
5
4 7 8
Hard #5
7 3 6 8 1 5
1 6 4 9
4 2 3
2 1 6 7
9 8
5 6 8
4 2 7 1
8 9 3
Hard #6
8 5 3 4
1 4 2 5
7 9 8
4 7
5 1 9 6
3 7 5
9 7
3 7
9 1 4 2 6
Hard #7
2 8
3 6 8 2
8 9 4 3
2 5 9 3
6 2 4 5
1 7 6
8 1 3
4 2
4 7 6
Hard #8
8 7 5 1
2
4 5 9
6 9 7
9 3 8 4 7 6
4 2 9
2 6 4
8 5 7 3
4 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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