Printable Hard Sudoku

Set 43r5bc. 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 9 2 4 6
8 6
6 1 8
8 5 3 1
9 4
7 2 8
6 7 3 9
3 8 2
7 4 1
Hard #2
7 4
6 8 9
7 1 3 2
8 5 9 7 3
3 7
7 6 2 1
2 3 8
5 2
3 4 6 1
Hard #3
3 8 7
5 9 8 1 4
7 4
8 9 3
6 5 9
1 7 8
6 3
3 8 6 7 5
9 4 8
Hard #4
1 8 5 6 3
2 8
8 7 2 4
9 4
3 9 8 5
7 5 2 6 9
7 6 3
2
4 5 2
Hard #5
8 9 7 4
3 5
4 3
2 6
7 1 2
4 7 8 9
6 4 1 8 2
7 8
8 9 2 4 3
Hard #6
8 9 1
1 5 4
7 9 2 6
1 5 4 8
8 1 4
9 6 7
6 8
4 5 6
6 3 1 2
Hard #7
8 3 9 2
5 9 1 8
3 6 7 9 5
7 8 9 1
3
6 1 2 8
2 9
5
4 5 6 2
Hard #8
8 3 9 2 6 4
8 9 2
5 3
8 2
9 1 4 7 6
2 5 8
4 3 7 5
4 9
5 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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