Printable Hard Sudoku

Set 1ccweq6. 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 8 4 6 5
2 7 6 3 8
3 8 7 4
9 3 6
4
7 8 1 2
2 1 4
1 7 3
1
Hard #2
7 1 8
1 2 4 5 6
3 5 9
3 7 1 6 2
5 4
5 2 9
9
9 4 8
4 7 2 1
Hard #3
1 8 7 3
6
6 4 7 9
1 8 2 4 9
4 8
5 7 1
2 6 9 7
9 1 5 7 8
4
Hard #4
5 1 9 7 6
3 6 9
7 5
8 2
7 5 2 3 8
5 2 6
5 1 7
4 2 1
8 4 3
Hard #5
2
4 5 9 3 7
5 2 1 4 9
7 5 3
4 8 7
9 4 1
2 5
1 6
6 3 7 9 4
Hard #6
8 5 2 6 4 1
8 4 2 7
7
4 6 3 9
9 2
2 3 8 4
9 3 1
4
1 6 2 3
Hard #7
5 1 7
3 5 7 2 8
6 8 4
8 5
6 9 2 5
4 2 3
9 6 3
5 8 2
7 9 3
Hard #8
2 9
7 8 3 2
5 3 8 1
4 5
8 9 7 2
3 9 6 1
6 3
4 8 7
7 2 6 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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