Printable Hard Sudoku

Set 1fu2f89. 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 2 9 4
5 4 6 7
6
8 7 1 5
5 8 1
1 2 9 7
5 6 8 9 3
7 3 4 1
Hard #2
1 4 2 8 5
9 6
8 7 6 2
2 3 6
8 1 5
6 3
8 3 7
5 7 2 4
6 3 2
Hard #3
8 3 5
7 6 8
1 8
5 8 1 4
4 9
9 5 7
6 1 8 2 3 4
4 9 6 3
7 1
Hard #4
6 1
7 9 8
4 1 7 5
5 3
7 2 6 8 4
9 2 8 7 1
6 1 3
8 2 9
9 2
Hard #5
4
9 8 7 3
2 6 3 1 9
3 5 4 6
2 9
4 1 2 8 9
8 2
3
6 9 5 7 4
Hard #6
5 8 1 4 3
3 1 6 8
2 4 5
5 9 8
7 1 5 4
5 7 1
5 6 9
2 9
6 2
Hard #7
2 7 9 5
9 6 1
5 3 6 9 4 7
5 3 7 6
9
7 6 1
5 3 4 7
3 1 6 8
Hard #8
7 5 1 4
1 9 7
9 4 2 6
7 8 5
4 2 6 9
6 9 3
9 1 6 4
2 3 8
3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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