Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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