Printable Hard Sudoku

Set jovl6i. 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
2 9 7 4 6
4 2
5 8 7 9
7 3
4 8 1
9 8 3 6
1 3 2 5 7
7 8
1 9
Hard #2
1 3 7
4 9 7 6
2 4
2 3 1 8
7
8 5 9 3 2 4
9 5 1
6
1 2 4 8 6
Hard #3
1 8 6 2 9
4 5 2
6 2 8 7
6 1 3
7 2 9
8 3 7
2 3
3 9
4 5 6 8
Hard #4
6 5 7
8 1 2
9
2 6 4
6 9 1
1 6 4 7 5
7 2 9 4 6
5 1 7
8 1 2
Hard #5
9 1
5 6
3 7 6 5 8
1 2 7 3
2 8
4 5 7
6 4
7 9 4 6
4 6 1 9 5
Hard #6
7 2 3
8 3 9 2 5
5 4 7
5 1
1 7 6 8 4
8 2 4
6 9 5
6 1 2
5 4
Hard #7
8 7 1 2
9 7
7 1 9 3
8 3 5
6 4 5 8
9 8
8 4
3 1 5 2
3 6 7 5
Hard #8
1 5 3 4 8
7 5
2 6
4 2 8 7 6
5 8 9
1 4 9 3
2 9 8 1
8 9
4 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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