Printable Hard Sudoku

Set 5p0sd5. 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
4 8
9 7 6 2
1 2 4 3
6 8
1 5
2 3 6 9 7 1
8 7 3 5
4 1 9 6
6
Hard #2
3 9
9 1 5
7 8 6
7 2 9 6
8 4
4 1 5 2 8
1 2 4
9 7 1 5
9 5 8
Hard #3
1 4 2
3 6 8 1
6 9 8
5 3 1 6
6 1 2 3 7
7 4
1 9 4 2
5
4 7 6
Hard #4
3 1
9 3 7 2
4 1 7 9
5 9 2 8
1 9 5 7
8 2 7 4
1 2 3 9
6
8 9
Hard #5
1 7 2
5 9 6 3
2 4
3 4 5 8
6 2 1
7 2
7 3 1 4 6 8
1 5 4
9 7
Hard #6
3
4 9 6
4 5 1 2 8
9 4 1 7
3 4 8
8 3 9
3 8 4
3 8 2
1 9 8 5
Hard #7
9 1 5 8
4 9 7 1
1 2 4
1 5 4
9 8 3 6
7 6 4
7 3 2
7
2 3 1 5
Hard #8
4 6 7 2 9
7 6
5 1 8
3 5 8 6
2 4 5 7
6 3
2 7
9 8 4 1
1 8 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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