Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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