Printable Hard Sudoku

Set 1pl34ym. 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 7 6 1
5 9
9 3 8 6
7 5 1
3 9 5
9 6 2 7
1 4
7 4 6 2
8 5 3
Hard #2
8 9 2
7 4 1 6
6 7
8 5
5 2 7
4 9 5 2 1
8 9
2 1 9
3 1 6 4 5
Hard #3
9 4 6 7
8
2 1 3
8 1 4 2 9 3
1 5 7
4 6 8
7 9
4 3 1 2
5 7 9
Hard #4
7 1 8 5 6 2
5 1 4
3 2
4 7 3 5
8 4 2
6 2 1
4 5
9 6 2
7 8 6
Hard #5
7 1 2
4 8 1 7
6 7 2
5 8
2 3 9
9 4 5
3 4 8 9 6
9 7 1 3
3 9
Hard #6
8 2 1
6 5 2
4 3 1 6
6 4 5 9
5 7 4 8
2 1 9 6
4 6 7
8 6 2 7
Hard #7
5 3 7
8 6
2
9 7 6 3 8
6
7 2 5
1 6 8 4 2
9 5 4 7
4 1 9 3 6
Hard #8
1 3
9 1 7 4 6
3 2
8 7 5
2 1 4 7
1 5 6
8 4
7 6 8 9
3 4 7 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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