Printable Hard Sudoku

Set 1vt7wj2. 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 4 8
9 1 2 5
3 5 9
6 5
3 5 7 9
2 7 5 1
7 8
6 3 8 5 2
6 3
Hard #2
5 8
2 6 3 1 8 5
9 3 5 1 6 7
1
2 9
4 2 6
5 4 8 9
8 6 2
7 1
Hard #3
6 8
3 9 4 8 6
2
7 2
2 4 3 6
5 3 4 8
1 3 5
1 4 7
8 5 7 1 9
Hard #4
5 3
3 7 2
9 4 3 5
2 8 1 7
8
1 6 2
8 5 3 7
4 8 6 1 5
3 9 6
Hard #5
4 2 9
9 7 8
8 1 3 6 4
1 3 9 6
3 7
9 8 6
7 4 8 9
3
5 3 2 8
Hard #6
2 8 7
2 9 1
5 7 9 1 2
5 4 8 6
8 4
2 9
9 5 8 4
1 3 7 2
1 9
Hard #7
7 4
3 7 4 2
8 9
8 6 5 1 7
1 8
5 9 1 6
6 9
4 2 7 9 3
5 3 1
Hard #8
1 4 5
9 8 6 5
5 2 3 9
3 6 5
7 8 1 9
2 3
7 1 8 3
1 4 5 2
8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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