Printable Hard Sudoku

Set 1jfw01c. 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
5 7 1 2
4 6 9
3 9
5 1
9 5 2 8 7
3 7
6 5 3
1 2 9 7
8 3 9 2
Hard #2
2 5 3
9 2 8 1
6
2 5
6 2 5 9 8 7
4 3 2
3 8 9
4 8 7
7 8 5 9
Hard #3
8 9 5
6 9 4 7
3 7 1
3 6 8 7
3 2 4
2 6 3
7 6
9 4 6 7 3 5
1
Hard #4
5 1 7 3
3 2
4 8 2 1 7
6 3 1 9 7
7 6
4
5 6 9
8 2 4 6
4 9 8
Hard #5
5 9 4 6
5 8
8 2 7 5
3 6 4
1 2 6 3 8
6 2 1
5 7 4 1
2 9 1 5
Hard #6
9 5
2 1 7
3 9 7 4 8
9 2 6 3
4 7 8 5
3 4 6
5 2 9
6 8 9
3 6
Hard #7
6 3 2 4 9 7
8 7 5 2
7 8 6 1
9 8 6 5
7
5 1
4 1 2
6
4 5 7 9
Hard #8
8 5 1
2 4 5
6 4 7 8 2
2 9
9 1 3 2 8
6 8 7
6 8
4 3 1
7 5 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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