Printable Hard Sudoku

Set 5956we. 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 9
3 1 5
1 2 7 3 8
7 6 9
5 4 1
3
5 7 8
7 6 9 3 4
3 8 5 6
Hard #2
7 4
8 9 5 1 3
2 9
3 6 2
6 1 8 3
4 5 7 2 8
6 9 8
8 4
1 3 5
Hard #3
1 3 4
4 8
6 2 1 9
5 1 2
5 8 6
4 6
4 1 8
1 8 9 2 4
6 2 5 3
Hard #4
4 3 5 1
5
6 8 9 3
6 9
2 1 4 5
5 4 2
9 6 8 4
8 3 9
2 1 3 7
Hard #5
7 5 1 6 9
8
4 3
9 5 4 2
6 8
7 2 9 3
2 3 9 5
1 9 5 7 3
3 8
Hard #6
1 8 7
3 5 6
2 7 3 9
6 5 4 3
8 4 5 9
7 4 8
8 2
2 4
6 2 1 5
Hard #7
1 4
1 4 9 7
9 5 2 3
2 6 3
9 8 1 4
5
8 2 1 5 7
1 7 5
1 4 8
Hard #8
2 4 8 3 7
3 9
7 2
8 5 7 2
8 3 5 1
6 1 8
6
4 3 2 5
2 9 8 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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