Printable Hard Sudoku

Set fvdn2n. 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
1 9
6 5 7 1
4 2 5
4 8 6 2
7 1 4
4 9 7
4 5
6 2 5 1 3
5 6 8
Hard #2
9 2 8 6 3
8 1 4
3 1
3 5
9 7 4 2 8
5 4 9
6 8 2
1 3
9 2 5 6
Hard #3
2 9 4 3
5 6 4
6 2 8
2 1 4
7 2 4 8
6 4 7
1 7 8 9
5 7
4 1 7
Hard #4
3 7 5 4
6 3
1 2 9
2 4 1 3
9 6 8
1 8 4
4 8 6 9
2 6 1 4 7
4
Hard #5
1 2 7
1 4
4 5 7 2 8
9 5 2
3 8
5 6 9 8 4
3
8 9 1
9 1 7 4 5
Hard #6
5 1 9 6
2 4
9 7 3
1 7 3 4
6 8 7
2 9 6 8
8 5 1 3 2
1
9 8 6
Hard #7
3 4 7
7 6
8 4 1 9
2 3 1 8
6 7 3
5 7 1
3 2 9 1
4 5 8
9 6 1
Hard #8
7 8
5 8 9
2 4
7 6 2 4 8 3
4 2 1
3 9 6
4 1 3
9 1 4 2
8 2 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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