Printable Hard Sudoku

Set 133deye. 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 6 7
9 5 8 3 6
7 9 2
6
7 4 2
4 8 5
3 6 1
8 2 7 9
4 9 3
Hard #2
5 2 4 7
7 9 5 1 6
6 7 8
9 3 2
8 5 1
3 1 9
1 5 4
9 8 7 6 1
Hard #3
8
1 7
7 5 3 8
4 2 9 7 6
7 4 5 3
9 3 1
6 1 9 5
4 9 5
8 7 1
Hard #4
6 8 4 1 3 9
2 9
2
3 7 9 4 1
3
1 3 2 7 5 6
1 6 3
6 7
9 1 7
Hard #5
1 5 8 7
8 7 2 1 9
3 1
8 6
7 4
5 9 2
1 5 3
5 6 1 4
4 3 9 1
Hard #6
2 4 3
9 6 2
7 6 1 2 5 9
8 2 4
5 6 7
4 7 5
3
8 2 4 1
1 7 3
Hard #7
7 2 8
6 9
1 4 5
5 7 6
9 1 4
8 7 3
3 4 6 1
6 5 3
1 5 2 9 6
Hard #8
2 9 6 8
4 9 6 7
6 3 1 5
3
4 1 8
5 7 4
7
3 6 1
8 6 1 2 3 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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