Printable Hard Sudoku

Set 1e6kjmn. 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 8 5 7 9 2
7 6 1 8
2 4
4 9
1 2
2 7 9 6
7 9
3 2 4 7
4 3 5
Hard #2
2 1
7 3 1 8
9 6 7 4
2
6 3
1 2 6 4 5
2 7 8
1 5 7 9 4
4 8 7
Hard #3
8 5 1
2 3 6 4
4
1 4 5 9
5 6 3
7 2 9 6
8 5 4 3 9
7 8
1 8 7
Hard #4
1 5
4 1 6
2 3 5 9
3 4 6 1
3
9 8 4 7
8 6 2 4 5
1 9 5 2
4 2
Hard #5
3 5 7
4 1 8
1 9 8 5 3
7 5
7 8 9 4
1 5
8 3 9 7
2 6 3
4 6 5
Hard #6
6 7 5 9
3 2 8 1
4 6 8
6 8
4 8 6 2
9 3 7 5
5 2 7
6 1
3 9 4
Hard #7
9 1 7 3
6 9
8 5 4
2 4 3 9
3 7 6 2 5
8
4 5 9 8
2
9 8 1 7 6
Hard #8
2 1 3
4 3
1 2 6 9 5 8
7 8
5 6 4 2
7 3
7 3 1 2
6 9 2 4
2 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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