Printable Hard Sudoku

Set 1p7z5dr. 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 3 1 6 9
2
5 3
3 4 6 7
5 8 9 6
9 2 7 3
1
9 4 6 1
8 2 3 4
Hard #2
2 3 5 7
1 2 5
4 7 1
7 3 2
1 2 6 3
5 4 8
2 8 9 6
8 1 7 4
5
Hard #3
4 1 5
8 5 2 4
2 9 4 6 8
3 1
9 8 6 3
2 5 7
5 9
2 1 6 3
7 6
Hard #4
6 1 5 7
4 6 9 8 2 5
4
8 3 7 9
8 1 2 4
5
6 7
7 5 2 8 9
8 1
Hard #5
9 2 7 8
7 5 9
1 2
5 7 1 6 9
1 4
2 6 7
7 8 1 5
5 4 3
2 5 7
Hard #6
9 5 4 3 1
3 7 9 2
7 8 3
1 8 4
6 1
2 3 7 1
1 6 9
3 7 4
4 9
Hard #7
4 1 9 2 5
5 6 7
9 6 7
8 4
5 1 3 9
3 4 8 1
8 1
6 7 8
1 5 3
Hard #8
6 1 2
8 9 1 5 3 4
3 8 1
9
7 3 9 6
5 9
9 7 6 1 2
3 8
1 2 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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