Printable Hard Sudoku

Set fwv1oc. 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
4 6 3
7 2 8
1
2 6 8
4 1 3 2 5
5 2 3 7
9 4 1 5
6 7 8
1 4 3
Hard #2
2 1 9 7 5
9 4
3 6 2
5 3 8 1
4
3 7 1 6
4 8
6 8 3
3 1 5 6 9
Hard #3
7 4 2
5 4 9
1 8 7 9
6 5
2 1 3
3 4 9 6
6 7
8 3 9 4
6 7 4 8
Hard #4
7 2
1 2 8 7 4
2 5 3 8
4 6 3
5 3 1 9
7 1 9 5
6 8 1
4
8 3 7
Hard #5
1 6 5 4
2 5
8 6 2
1 9 2
6 7 8 5 1
3 6 5
5 9
7 4 2 1
6 9 3
Hard #6
5
8 1 6 9 7 3
7 8
8 9 7
8 1
7 4 2
5 1 6 7
6 3
3 4 7 5 8 6
Hard #7
4 1
3 8 5
4 7
6 9 5 4
5 6 3
4 5 9
8 1 4 2
3 4 6 7
1 7 3 2
Hard #8
9 4 6 3 8
5 6 7 9
8 2 4
6 7 1 3
5 8 6
1 6 7
4 7 8
8 2 9 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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