Printable Hard Sudoku

Set 19uuwey. 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
9 3
4 9 5
5 6 8
4 3 8 7
3 7
2 7 6
1 5 7 8
4 8 2
3 9 7 1 4
Hard #2
6 4 2
3 6
9 5 3 2
7 8 2 6
5 2 1 7 9
9 1
7 8
2 4 7 3 5 1
5
Hard #3
9 3 7
8 2 6
1 6 9 4
4 3 8 7 1
1 5
5 4
5 8 2 3
9 1 6 5
6 2
Hard #4
5 8 6
6 4 7 5
9 2 3
3 4 9 2
8 6 1 7
9 5 4
2 8
6
2 9 7 6 5
Hard #5
1 3 2
6 8 4
4 6 5 7 8
7 8 9 6
6 5 9
2
9 7
9 6 2 8 7
2 1 5
Hard #6
6 1
6 1 2
7 1 8 9
1 5 3 6
1 9 8 7
6 2 4
7 5 2
4 7 3
7 9 2
Hard #7
8 6 9 5 1
9 2
5 7
6 4 2 3
1 8 4
3 4 8 2
4 5 3 8
1 9
7 6 9
Hard #8
2 9 8
6 7 5
5 4 7 1 3
1 2 7
6 4 7
6 8 1
4 1 2 9
3 8 4
9 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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