Printable Hard Sudoku

Set 92dfzm. 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
2 3 4
1 2 8
7 4 8
3 5 9
9 2 1
6 4 5 9
2 7 8 9
7 3 4 1
5 6
Hard #2
2 9 5 8 1
6 5 3 4
9 5
4 7 6
8 5 7 1
2 1 8
3 2 8 7
3 9
8 6
Hard #3
6 2 8 5
6 1 8 2
3
1 4 2 7
6 3 9 8
1
4 9 1
7 1 5 2
5 6 3 7
Hard #4
9 6 7 8 3
8 9 6
2 7
3 9 4
2 5 8 4 1
8 3
4 3 5
2 3
5 8 4 6
Hard #5
1 9 6 2
6 5 9 1
2
2 6 4 7 9
7 1
5 7 8 6
4 1 3
9 6 5
2 4 6
Hard #6
5 9
8 7 9 4
4 8 3 5
1 3 7 2
2 3 4 1
9 4 6
9 8 7 1
1
2 7 9
Hard #7
3 1
4 5 7 9
9 4 5 6
2 7 9 6
3 6
5 4 7
1 8
4 2 1
4 9 6 2 1
Hard #8
9 4 2 6 1
4 3 9
5 1 2 7
2 4 3 8
6 4
8 7 1 5
2
8 5 1
3 5 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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