Printable Hard Sudoku

Set 11v00pd. 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
2 7 8 4 1
6 1 7 9
3 2
9 7
5 4 9 2
3 8 5
7 1 4
3 4 2 7
4 1
Hard #2
2 8 4
8 5 7 9
1 5
7 6
4 2 6 7
7 3 8
4 7 6 3 5
9 3
8 5 9 1
Hard #3
2 6 9
1 5 4
8 2 9
3 4 6
1 7 6
9 4 8 1
6 1
3 1 5 4
9 8 4 2
Hard #4
7 8 1
6 4 2 8 3
1
4 3 6
3 9
8 6 7
2 9 6 4 3
1 4 9
5 3 6 8
Hard #5
6 4
2 7 8 3 5
3 9 5
3 4 8
3 6 7
7 2 4
5 7 8 1
3 2 1 5 4
8
Hard #6
1 5 2 6
1 6 9
2 4 9
7 6 5
9 6 1 7 4
4
5 4 7
9 1
6 3 9 5 2
Hard #7
9 8 5
3 4 2 6
4 1 2 8 9
6 1 3
5 3 2 4 8
5 7
7 5 9
2
6 5 4
Hard #8
6 8 9 1
3 7 1 5
2 1 3 7
5 4 6 2 1
6 5
8
7 9 8 6
7 3 5 9
6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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