Printable Hard Sudoku

Set 130w4jj. 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 2 4 3
9 1 7 6
2 6 5 9
7 8 5
6 9 7
8 2 3
4 3 8
1
3 1 8 6
Hard #2
1 2 9 3 7
5 6
7 4
9 8 2 7 4
9
3 9 5
6 3 9 8
1 7 8 4
1 5 7
Hard #3
9 7
3 9
8 7 6 3
3 2 5
1 9 5 7
3 2
3 4 8
2 3 5 8
7 5 2 3 9
Hard #4
2 4
7 4 6
8 6 3 7 5
3 2 1 8
6 5
9 5 3 1
4 2 5 8 1
8 3 4 6
Hard #5
4 1 7 5 2 6
2
9 5 1 3
6 5 7
5 4 8
4
3 7 2
7 8 9 1
9 1 3 6
Hard #6
3 8
7 9
7 5 1 9
8 5
2 3 4 8 9
9 6 8 5
9 6 5 4
4 8 6 7
3 5
Hard #7
7 1
8 2 3 5
6 4 3
5
7 1 8
4 5 6 2
2 5 1 8
8 3
1 5 8 3 7 9
Hard #8
1 6 5 8
7 3
4 1 6
1 6 4 5
8 6 3 9 1
5 3 4
5 7 9
3 9 8
7 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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