Printable Hard Sudoku

Set 1bpa120. 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 3 8 1
1 5 3 9
9
5 6 3
4 2
7 6 5
3 1 8 7 2
7 3
9 5 6 7 3
Hard #2
8 6 7 3
2 5 9 6
9 2 5
7 4 6
5 9
1 4 8 9
1 9 6 8 2
2
2 1 3
Hard #3
5 6 4 1
8 5 6 9
4 7 6 3
3
5 8 3 6
4 6 5
9 3
8 5
5 9 2 8 7
Hard #4
8 3 6
4 2 9 7
9 7 2
1 8 7 4 5 2
4 1 9
8
4 3
3 8
1 5 6 7 2
Hard #5
3 7 6 8 9
9 1
1 4 6 8
9 4 5 6
7 9 3
2
3 2 9 5
7 3 8
1 7 2
Hard #6
1 8 5
7
5 3 4 1 6 2
1 8 7
7 6
6 7 3 9
1 2 6 4
4 9 8 3
5 7
Hard #7
4
7 4 1 8 5
9 8 5 7 3 4
8 2 9
2 1 3 9
8 3 9 5
5 9
3
3 1 2
Hard #8
2 7 8 1
1 2 6
4 1 9
3 4
9 8 1 6 7
8 7 3
2 6 8
4 7 5
5 2 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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