Printable Hard Sudoku

Set 1jg6p5c. 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 9 2
6 8 1
6 7 2 4
2 3 4
8 5
5 1 6
3 4 8
9 6 7
7 5 2 9 1
Hard #2
2 3 4 9
9
9 6 5 1 7
5 3 1 2 6
2 8 3
1 9
4
5 7 6 4 8
2 5 9
Hard #3
3 1 5
8 2 3 1 9
6 7
9
4
8 3 2 5 7 9
3 9 1 8 2
5 7 4 3
6 5
Hard #4
4 8
9 3 6
7 5
2 7 5 8
9 3 2
1 3 2 6 7
5 1 7 6
6 8 7 2
9 1
Hard #5
4 8 1
2 7 3
7 8 5 9
4 5 6
1 6 9
6 3 8 5
4 9 6
7 9
8 1 9 2
Hard #6
7 4 3 6
5 6 1 7
3
5 9
2 1 3
7 4 9 2 8
1 5 7 4
2 3 8
6 7 9
Hard #7
1 3 8
4 8 2 6
8 7 5
8 9 7
7 8 3 4 6
6 3 9 7
9 5
4
7 9 8 1
Hard #8
9 2 3 1
1 3 6
2 4 9 7
2 6 9 7
5 4
9 1 7 2
3 1 7 5
6
1 5 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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