Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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