Printable Hard Sudoku

Set l13060. 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
6 4 9 2
3 5
4 6 5 1
2 1 6 5 4
5 9
8 4 7 5
2 1 3 6
6 7 3
7
Hard #2
7 2 8 1
1 4 7 6
5
3
5 9 2 1
6 5 4 2
8 2 1 3
6 1 8 4
5 3 9
Hard #3
8 5
1 7
4 2 7 1
9 3 7
5 8 6 1 4
3 7 4 2 6
5 1
3 5 7
6 3 2
Hard #4
8 1 7
1 2 5 4
7 5 3
4 2 9 1 7
9 8 6
3 9
3 9 5
7 6 9
7 5 6
Hard #5
4 7 1
9 8 1
1 7 6
7 4 3 2
8 4 7 1
2 9 3 4
6 8 5
3 5 1
8 9
Hard #6
7 8 4
9 7
2 7 1
2 3
4 8 6 9 5 2
9 8 6 3
3 4 5
8 5 7 9
6 2
Hard #7
6 2 9
4 2
2 3 7 6
3 8 7
8 2 5
9 3 4
2 3 7
7 2 4 1 9
7 9 1
Hard #8
7 6 8 2
3 4 2 9
3 6 1
6 5 8 1
1 7
8 4 1 3
1 7 4
4 2
8 2 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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