Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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