Printable Hard Sudoku

Set 189zs4v. 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 2
1 4
7 3 2 9 8
3 6 8 4
5 8 9 1
4 7
2 3
9 3 7 2 8
4 1 5
Hard #2
8 7
1 7 6
2 1 3 5
3 6
2 6 8
4 2 7 3 1
1 4 6 9
4 8
5 7 4 3
Hard #3
2 6 4
4 9 3
5 7 1 3
1 3
9 8 1 3
7 5 1 4 8
6 1 5
1 9 2
2 8
Hard #4
8 5 7 1
5 6
4 1
5 9 8 3
6 5 7 9 2
1 6 5
9 1 2 4
5 3
8 7 2
Hard #5
2
7 2 6 8
2 5 6
1 9 6 3 5
3 2 4 1 7
7 2 3
4
9 5 6 3 1
8 1
Hard #6
4 5 7
5 6 7 3
2 9 8
7 5
2 6 9 4 1 7
3 7 6 9 2
6 3
1 9
1 9
Hard #7
6 7 9 2
2 4 6
6 9 5
4 3 1 7
5 4 9 6
3 8 9
2 1 6
5 2 3 1
7
Hard #8
1 2 4
9 2 5 7
6 8 9 7
9 2
7 6 5
3 5
2 4 8 3
6 3 8 5 1
5 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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