Printable Hard Sudoku

Set 38pxme. 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
4 3 5
3 1 4 9
1 3
7
6 7 2 9 4
8 6 5
6 1 5 4 7
4 8
8 9 2 1
Hard #2
3 6 8 4
9 2 6 7
9 3
9 8 7 1 3 6
6 8 4 7
7 6 2 3
1 5
2 3 1
Hard #3
5 9 3 2
3 8 5
4 7 1 3
3 4 7 9 8
7 5 3 1 2
5
3 1 9
2 1 4
3
Hard #4
6 5
6 8
9 8 6 2 5
7 5 9
9 6 5 4
3 7 8 1
3 4 1
6 7 5
8 5 4
Hard #5
9 8 6 4
8
7 2 1 5
1 4 8 2 5
4 3 1
6 5 8 7
2 3
9 3 6
5 1 8
Hard #6
4 1 9 7 5
7 5 6
9 5 7 2
5 4 7
8 9
2
9 7 4
3 5 4
4 5 6 9 2
Hard #7
9 7 3 5
1
5 1 4 2 9 3
3 5 4
8 7 5 6
6 3 8
5 9 2
2 7 6 8
3
Hard #8
2 5 7 6 8
8 6 4 5
7 9 2
6 4 2 5
1 2 6
3 8
3 9 6 7
5 8
9 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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