Printable Hard Sudoku

Set 1vyku72. 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
6 4 5
5 1 4
2 5 8
5 4 8 3
6 7 2
8 9
2 6 9 1
5 4 6 2
8 9 3
Hard #2
1 9 5 8
2 8
7 1 6
7 5 8 6
1 3 7 8 5
2 6 1 9
3 9 4
9 5 6 4
Hard #3
8 6 2
4 7 2 3 9
5 3
6
7 3 6
2 1 4 3 8
9 1 6 8
6 3 9 2
5 4
Hard #4
8 3
9 3 1 8 5
2 1
5 6 8 1 3
6 5
7 2 9
2 1 6 9 4
3 5
4 2 7
Hard #5
2 7 9 8
4 3 6 2 5
1 4
1 8 5 6 7
2 8 6 1
5
8 6 5
4 9 1
7 3
Hard #6
2 8 5
9 4
5 4 2 3 7
8 2 3
8 5
3 1 7 6
1 3
5 4 7 1
1 6 9 4
Hard #7
9 8
1 5 9
3 4
5 4 1
6 8 7 2
1 7 8
9 3 1
8 6 9 2
4 7 9 6 5
Hard #8
2 8 7 3
6 5 8 9
4 9 1
3 5 4 6
7 9 3 1
9 2 8 7
5
2 6 7
4 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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