Printable Hard Sudoku

Set 127m047. 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
1 3 9
4 7 6 1
6 1 9
8 2 1
6 5 9 7
7 6 5 3
8 3 9 1
6
1 5 7
Hard #2
9 2
7 2 8 4
4 6 7
9 8 6 5 7
5 9 1 6 8
1 3
8 4 7 5
2
4 9 6
Hard #3
3 4 2 9 1
7 4 2
6
9 8
8 1 2 9 4
1 7 6 3
8 2
7 2 1 3
6 9 7
Hard #4
7 8 4
1 5 8
6 8 9 2
8 2 1 4 6 7
1 9 3
7 9 6 2
2 4
6 7 1
3
Hard #5
4 1 9
7 9 2 3
3 8 2 6 5
7 3 5 4 8
2 6 7
5 6
5 2
8 4 5
2 9
Hard #6
8 2 4 1 5
4 8 9 6
5 1 4
3 7
1 7
2 5 3
9 2 8
7 3 8 5
6 7 9
Hard #7
7 5 2 3
6 2
4 5 1 9
9 7 2 6
1 8 6 4
4 3 8 1
2 7
5 6 9
1 4
Hard #8
3 9 1
7 9 8 3
6 1 2
3 6 5
8 1 9 2
4 5 3
9 7 6
3
9 8 1 2 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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