Printable Hard Sudoku

Set e1o6lq. 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
5 9 4 6
5 8
8 2 7 5
3 6 4
1 2 6 3 8
6 2 1
5 7 4 1
2 9 1 5
Hard #2
9 5
2 1 7
3 9 7 4 8
9 2 6 3
4 7 8 5
3 4 6
5 2 9
6 8 9
3 6
Hard #3
6 3 2 4 9 7
8 7 5 2
7 8 6 1
9 8 6 5
7
5 1
4 1 2
6
4 5 7 9
Hard #4
8 5 1
2 4 5
6 4 7 8 2
2 9
9 1 3 2 8
6 8 7
6 8
4 3 1
7 5 9
Hard #5
2
1 4 7
8 9 5
4 1
6 3 2 9
9 3 2 4
4 8 6 2
7 4 8 5 9
1 9 3
Hard #6
7 2
9 8 1 2 7
5 6 9
1 8 9 4
1
2 5 9 7 6
4 8
9 7 8 1
2 4 7
Hard #7
2 4
6 3 4 9
7 5 2
8 2 4 6 1
7
6 1 3 4 8
5 4 2
3 2 4 5
9 8
Hard #8
9 3 7 6
1 8 3
8 9 1 6 2
6 7
2 6 5 9
8 9 5 6 3
6 4 9
1 2 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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