Printable Hard Sudoku

Set 260234. 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
1 7 4 8
3
2 3 1 9 5
7 1 2 3
6 3 5 2 4
7
4 8 1
9 4 8
9 6 3
Hard #2
1 4 9 7
7 8 9
2
5 4 9 8
2 8
9 1 3
1 7 5 9
1 7 2 8
5 6 1 7
Hard #3
9 2 3
2 1 8
8 9 6
6 2 7
4 7 6 2 1 5
5 1 4 7 3
6 3
1 8 5
7
Hard #4
8 3 7
2 4 6 5
3 5 8
6 4 8 7 9
9 2 7
7 6 1
1 6 3 7 2
4 3
6
Hard #5
6 8 2
1 8 9 5
3 6
9 1 3 7 4
4 8
5 8 7 9
8 4 1 7
7 5 8 6
9
Hard #6
1 6
6 4 1
9 5 8
1
7 3 2 4 8 1
2 3 8
9 5 7 3
8 3 9 7
3 2 6
Hard #7
1 9 4 5
9 7 2
8 6 9
6 7 3
9 8 4 2
4 3
6 5 9
5 6 4
2 1 8 7
Hard #8
3 2 5
4 3
5 1 2 9
7 5 4
1 3 8
5 8 1
8 9 5
4 9 7 2 8
7 2 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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