Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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