Printable Hard Sudoku

Set 14q6ud9. 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 7 8 4 5
2 4 1
9 3
3 7 1
8 6 7 4
5 4 6
5 7 8 4
3 9 8
3 2
Hard #2
8 6 7
4 8 5 3 1
9 3 7
2 3 1 4
6 4
5 2 7
2 6 5 7
4 9
7 6 8
Hard #3
9 8 4
5 4 6
1 3 4
8 5 3 1
6 7 5 2
4 1 6 7
6
7 4 2
2 6 1 9
Hard #4
7 6
3 2 4 7
1 5 6 3
3 4 9 7
8 2 5
4
1 9 3
5 2 9
2 1 5 3 7
Hard #5
4 5 3
9 5 1
8 7 6
1 8 3 6
4 3 8
1 2
7 9 1
9 5 2 7
7 6 8 4
Hard #6
7 4 2 5
4 1 7 6
8 9 6 7 2
1 4 6
7 5 1
2 6 4
8 5 3
5 6 9 2
Hard #7
4 9 2
2 6 1 8 4 3
3 6 9
1
6 5
8 9 7 6
6 5 9 1
4 3 6 2
8 2
Hard #8
2 4 5 8
4 3
1 3 9
3 7 4
2
7 9 3 6 1
8 6 1 7
6 7 8 5 9
8 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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