Printable Hard Sudoku

Set yl3ddo. 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
7 6
4 2 5
9 1
1 7
3 9 2 4
2 8 7 1 4 3
8 6 9 2
6 3 4 1 9
5
Hard #2
4 9
4 2 8
2 7 8 1
5 8 1
6 3 9
4 1 5 7
1 2 3
6 5 9 2 1
8 6
Hard #3
1 4 6 8
9 3 2
5 1
4 6 1 5
2 8 1 7
7 6
7 9 2 3
4 8 3 5
1 2
Hard #4
9 1 2
2 1 5 4
1 6 5 3
1 8 5 7
2 1 6
4 8
8 5
6 3
5 7 6 9 3
Hard #5
6 9 7
5 2 6 1
8 6 1 9
3 4 7
8 2 1 4
1 7 5 6
1 6 2 7
9
3 7
Hard #6
2
4 1 3
6 2 7 4 5
1 4 6
9 3
8 3 6 9 1
7 6 9 8
1 5
8 4 2 7
Hard #7
1 7
8 9 5 4 1
1 4 5 2
6 9 7 2
5 2 6
4 9
7 3 2 8
9 3
9 1 5
Hard #8
9
8 2 3 9 5 6
7 8 2
3 7 1 9
8 4 7 3
2 3 1
1 4 3 9
6 2
3 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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