Printable Hard Sudoku

Set 4g0zui. 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 1 6
7 4 3 8
4 2 1
7 4
2 3 7
9 6 8
9 1 8 4 2
6 2
8 3 7 6
Hard #2
6 8 3
2 9 7 4
4 9 8 7
5 6
8 9 5 6 2
3 4 2 5
4 5 3
2 8 7 5
Hard #3
7 2 4
6 9 5
8 7 4
3 6 1
8 5 1 4 3
6 7 8 4
8 3 2
3 6
9 7 8
Hard #4
2
4 6 5 1
7 5 8
2 7 4
1 5 7
9 7 6 3
9
6 3 8 7 2 5
2 5 6 9
Hard #5
2 1 9
9 2
7 1 4 5 3
7 4 5
3 1 5 8
8 9 6
7 6
1 9 4 6
8 3 1
Hard #6
2 6 1 8
8 7 5 3
3 5 6 1
9 6 7
1 9 8
4 6 9
6 2
4 8 5 3 2
7
Hard #7
2 4
4 3 7 5 6
1 8
9 6 4
7 8 9
7 8 6
9 3 2
2 5 9 1
8 5 9 3
Hard #8
6 5 9 1 2
9 6 2 8
4 7 9
9 2 1
8 2 3
1 8 7
4 5 9 6
3 9
2 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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