Printable Hard Sudoku

Set 1fz3m88. 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
8 7 5
2 9 4
4 7 5 9 2
6 3 1
5 6 8 4 2
9 4 3
8 2 6 3 7 4
2
Hard #2
4 5 3
1 9 8 4
6 9 1 2
7 9
9 8 1 2
5 7
7 5 6
3 1 4 9
2 3 1
Hard #3
2 8
4 7 5
9 8 3 4 7
9 8 1
3 9 4
5 1
8 6 7 9 5
1 7 4
4 7 3
Hard #4
3 6 8 4
1
9 3 1 2 7
7 5 8 6
9 3 6
6 5 3
8 7 3 1
9
5 1 6 8
Hard #5
8 3 2
1 9 2 8
1
8 4
5 9 3
4 2 7 1 6 8
8 6 7
7 3 9 4 2
4 7
Hard #6
6 3
2 9 8 6
9
9 4 8
1 6 7 9 2
2 4
7 8 1 4 6
2 9 3
9 1 4 6
Hard #7
8 6 4
7 2 9
4 2 3 5 7
9 1 6 8 3
5 4 9 2
5 3 1 2
8 9 2 6 4
Hard #8
6 1 4 9
2 4 7 5 6
1 9 3
8 4 1 2 9
5
2 8
4 8
9 6 4
5 2 9 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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