Printable Hard Sudoku

Set 1e9jfub. 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 5 9 6 7
7 3
6 1 4 8
7 8 9
3 1 8 6
5 2
5 1
8 4
2 6 1 5 9
Hard #2
3 1 6
8 2 1 4
6 9 3 5
4 8 5
1 2 5
2
9 8 3 5
2 4 7 1
2 9 4
Hard #3
2 6 3
9 8 4
8 9 1 7
9 3 4
5 1 2 9
2 1 7 3 5
7
2 9 1 4
5 6
Hard #4
4 3 2 5
8 7 5 9
3 7 1
6 9
2 4
1 5 9 4
1 8 4
9 8 6 5 2 3
8
Hard #5
6 3 4 9
9 1
2 3 5
3 8 6 1
1 4 7 9 2
4 2
7 4 3
1 6
3 5 2 1
Hard #6
5 1 4
9 2 5 7
4 5 3 9
8 4 1
2 6
5 1 2 6 8 3
4 7
3 2 7
5 8
Hard #7
8 2 9 6
9 1 8
1 2 4
1 2 5 7 4
9 3 5 8
5 7 3
8
5 4 3
8 3 6
Hard #8
1
7 8 1 5
4 8 2 9
5 3 2
6 4 9
3 9 8
9 3 6
7 3 8
8 4 2 3 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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