Printable Hard Sudoku

Set 1ey4xib. 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
9 3
4 3 5 1 9
2 9 7 3
6 1 4
8 5 6 9
5
1 8 2 7
5 4
5 1 3 4
Hard #2
9 7 2
3 8 5
2 1 4
9 2 4 8
1 9 2
8 7
4 7 5 8
7 4 6
2 6 3 1
Hard #3
3 1 6
6 2 4
5 8 2
4 7 2 3
1 4
2 3 5 9 6
9
4 5 9 6 1
4 1 9
Hard #4
1 8 7
2 3 5 6 8 1
9 6
1 5
8 3 9
9 6 7 4 3
5 4 1
7
8 4 5 6
Hard #5
3 2 6
2 1 6 3 4 7
3 1
5 8 6 2 1
8 9 3 7
4 5
9 6 8
1
7 4 1
Hard #6
5 1 3 9
7 6 9 4 2
4
2 7
7 2 1
4 8 3 2
9 5 4 6
6 8
7 1 8 4
Hard #7
4 9 3 2 1
1 9 3
7 1 4 9
6 3
9 7 5 2
8 2 7
6 7
2 1 6
8 6 2
Hard #8
6
2 3 6 7 8
6 1 5
4 9 6
9 8 1
5 1 4 2
2 5 7 9 6
7 5
4 2 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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