Printable Hard Sudoku

Set 1gk3y86. 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 1
7 6 5
3 1
6 7 8 1
2 9 5
4 5 9
6 7 9
7 3 5 2 6
1 7 3
Hard #2
6 8
9 7 4 8
4 7 3 1
2 9 6
6 1 2 9
4 5
5 3 4 2
1 2 3
9 1 8
Hard #3
3 8 4 9
8 6
2 3 9 1
4 5 6 9
2 3 5 7
4 3 8
9 2 8 6
6 8 2
7
Hard #4
3 8 4 7 1
5
5 6 7 8
1 4 7 2
5 4 9
4 9 6
1 2 8 5
5 9
7 9 4
Hard #5
7 2
3 6 4 8
2 6 8
2 5 6 7 8
1 9 3
8 4 5
9 7 8
2 9
1 7 8 5
Hard #6
3 7 1 4
1 9 8 5
9 3
2 9
9 3 4 5
8 2 1 4 6
6 9 3 7
5 8 2
2
Hard #7
7 9 8
7 4 9 1
1 2 8 7 4
4 8
3 5 2
9 6 8 2
9 7 2 1
2 5
4 6
Hard #8
2 8 6
5 9 8 7
5 3
7 3 9
2 1 7
9 8
3 7 8 6 1
8 5 2 7
8 5 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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