Printable Hard Sudoku

Set 1e7jcx4. 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
6 9
4 3 1 7
9 5
7 2 3
1 5 7 2
5 7 6 4
8 9 6 4 3 2
4 3 8 5
Hard #2
1
1 2 3 6
7 2 5 9
8 6 7 3
6 1
9 3 2
8 9 3 2 5
1 7
5 8 6 9
Hard #3
3 6 1 7 5 9
8 5 3
9
5 3 7 8 2
7 1 4
6 4
8 6 2 7
5 3
7 9 5
Hard #4
4 3 8
2 9 6
8 9 4
1 7 4 2
4 1
6 5 2 3
5 2 1 6
3 6
4 6 7 9
Hard #5
5 3 4
8 3 9
4 2 7
5 6 4 2
1 5
3 9 2 8
4 1 5 3
9 3 1
2 4 7
Hard #6
2 1 5
8 4
4 6 2 7
2 5 3
5 3 2
9 1
4 7 8 6
9 6 5 8 3
1 2 4
Hard #7
6 9 8 1
4 2 7
3 8 5
9 1 2
1 4 6
6 8 3 9
3 9 2 6 7
8 4 9
2
Hard #8
2
5 3 1 6
6 8 7 4 1
6 8 2 4
4 5 9
7 6 1
8 5
5 7
5 4 9 8 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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