Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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