Printable Hard Sudoku

Set g0es7m. 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 7 1 2 5
7 6
3 9 8 7
5
4 8
7 8 9
5 2 3 1 9
6 1
9 6 7 5 2
Hard #2
3 5 9 2 8 6
6 1 7 8
2 5
5 1 4 2 3
5 4
9
8 2 4
7 6 2 5
9 7
Hard #3
9 3 7
2 5 1
8 6 4
3 9 7
5 8
7 4 8 9 1 3
9 3 6
2 6 1 3
6 5
Hard #4
3 7 4 6
3 2 9
2 5
8 6
3 4 9 6
5 2 3 7 1
9 5 1
2 7 9 4
8 3
Hard #5
4
4 2 1 5 6 3
3 7 6 9
4 8 3
1 2
5 1 4 3
6 9
8 2 7 1
1 4 9
Hard #6
5 2 8
7 6 2
6 1 9
1 4 9 8 2
8 6 1
8 3
8 2 7 1
3 9
7 1 5 3
Hard #7
1 4 6
7 2 8 3 4
3 6 1
9 7
1 9 5 4
8 5 2 1 7
8 4 9
7 5
3 1
Hard #8
1 9 8
6 2 7
8 1 4 9
3 8
3 9 8 1
4 2 9 6 3
4
5 6 8
1 2 4 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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