Printable Hard Sudoku

Set w9kwmj. 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
8 3 7
5 4 3
3 2 9 1 4
7 6 1
9 8 7
1 4 7 9
4 2
6 7 3
8 9 6
Hard #2
1 4 6
8 5 1
4 7 2
7
6 9 3 4
5 8 6 2 7 1
7 1
4
1 8 6 3 9 2
Hard #3
5 3 8
9 7 2 3 8
2 6 9
6
5 8 2
1 2 4 8 5
1 4 9
2 8 5 4
7 1
Hard #4
4 7 6 8
6
1 5 2 8
1 5 4
2 5 4 7 1
5 4 3 2
7 9
4 2
8 3 2 1
Hard #5
2
3 8
8 6 1 5 3
2 4 3 6
3 1 6
5 6 4 8
5 3 4 7
8 2 3
1 9 4
Hard #6
3 6 2 9 7 5
5 2 8
3 2
1 7 4 8 6
9
9 1 6 4 2
1
2 7 1
5 3 9
Hard #7
2 9 3 8
3 9
6
2
5 4
4 6 8 1 2
2 3 7 9 1 6
9 2 1
1 6 8 9 3
Hard #8
7 5 6 8
6 9
4 3 1 2
2 7
4 8
7 8 2 1 4
9 2 4 7 3
1 9 3 2
4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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