Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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