Printable Hard Sudoku

Set 1jpea7k. 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
8 1 5 9
3 7 6 1 8
2 4 3
2 5 1
3 7 2
4 6
7 8 1 3
8
5 9 6 8
Hard #2
4 2 8 7
5 9 2 7 3
9 1
9 1 5 4
2 1 8 3
9 5 7 6 2
6
2 3 9 7
Hard #3
2 6 8 3 4
5 2 7
9 1 8
9 7 8
4 2 9 6
8 2 6 1
6 7 3 4
4 7
9
Hard #4
4 7 6 9
2 8 5
8 2 3
9 3
1 7 3
1 8
2 1 7
9 7 2 4
6 5 4 8 2
Hard #5
3 1 5
7 5 8
3 8 6
4 6 3
1 8 9 2
2 9 7
1
5 9 7 6
6 1 9 5 7
Hard #6
2 4
3 8 2
7 3 8 9
4 7 8 6
5 4 6
2
6 1 7 2 9 5
9 4
4 3 1 7
Hard #7
5
1 4 3 6 2
5 9
4 8 1
2 9
2 6 3
3 6 7 9 5
1 7
9 7 2 4 8 6
Hard #8
6 3 1
9 6
6 8 5 4
6 2 1
3 9 1 5
1 7 9
4 2 8 3
8 6 7 1
7 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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