Printable Hard Sudoku

Set e0y4dd. 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 5 6
3 8 9
1 2
7 1 5 3
6 8 7 2
2 3 8 7
2 3 6 9 5
2
4 7 9
Hard #2
5 2 8 1 9 3
6 9 7 8
9 8 4
1 8 5
1 2 6
3 9 6 1
1
4 6 7
5 3
Hard #3
9 1 7 8
2 8 5 1
9 5 7 6
1 9
4 6 2 3
2 3 8
7 5
8 9 7
4 2 7
Hard #4
8 6
5
8 4 6 5 7
9 2 5
2 6
3 7 1 2
5 1 7 8 6
8 4 3
2 1 8 7
Hard #5
8
4 1 9
3 5 6 4
2 9 6 7
1 8 5 7 2
2 1
6 7 3 4
8 1 5 6
2 9
Hard #6
5 3
6 1 4 7
7 4
8 2 6
6 9 2 3
6 7 3 5
1
5 8 9 7
7 3 5 1 9
Hard #7
7 5
5 8 4 3
6 1 4 3
6 4 2
5 7
1 3 5 9
6
3 7 9
3 8 1 5 6 4
Hard #8
2 4 7
1 8 3
6
9 3 7 8 4
2 6
4 2 1 9
7 3 9 5 1
6 5 7
9 4 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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