Printable Hard Sudoku

Set 2few46. 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
6 7
5 3
8 4 1 3 5
3 2
8 1 4
8 2 7 9 3
6 5
1 8 7 6
7 8 2 4
Hard #2
9 1 5
3 4 7
7 5 2
5 3 2
2 9 4 3
7 2 1
1 4 6
8 4 2
3 5 6 8
Hard #3
7 3 9 5
4 6 9 7
5 7 1 4 6
1 5 7 2
5 9 2 4
3 6
5 1 6
3 5
9
Hard #4
3 9 7 8 5
5 3 6 4
2 5 6
2 6 5 9
6 1
7 8 3
5 1
8 9 7 2
1 4
Hard #5
5 8
9 4 3 7
2 8 4
6 2 9
4 1 3 6 5
9 7
1 3 4
3 9 7 5
4 7 2
Hard #6
3 1 9 5 4
9 4 7
5 2 7
4
7 1
8 6 4 2
9 7 5 8
3 9 6
5 3 6 2
Hard #7
6 3 2
9 7 5
2 6 3 7
3 8 9
2 8 6
4 8 1 5
8 4 7 2 1
9
3 6 4
Hard #8
8 7 1 5
6 2 7 8
3 5 8 6
2
1 2 5 4
6 3 9
1 7 2
2 8 9 6
4 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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