Printable Hard Sudoku

Set 1ejm9td. 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
5 6 3
6 3 8 7 4
1
9 3 8 7 1 4
4 8
8 5 1 3
7 9
9 2 6
5 3 9
Hard #2
1 5 8 7 3 9
7 5 2 1
3 1
8 1 3
9 3 1 7 2
8 9
2 3 1
8 2 5
6
Hard #3
1 6 8
8 2 5 9
3 5 1 7
7 2 3
6 9 5
4 7
9 3 1 2
3 5 4
9 5 3
Hard #4
3 7
1 8 6
9 4 5 1
6 3 9 7
2 4 1
3 5 2 4
4
8 6 3 9 7
7 2 5
Hard #5
8 1 9 5
9 3
6 4 7 5 8
5 6
1
4 7 5 6
4 8 6 7
5 3 4
2 1 9 8
Hard #6
7 1
1 3 4 7 9
9 3 8
3 6 2
2 1 4
6 4 5
9 6 5 2
5 8 2
7 8 5
Hard #7
9 1
8 6 7 4 9 5
1 6
5 7 1 4
4 7
1 4 2 8
6 8
5 6 1 2
4 8 9
Hard #8
2 1 4 6 7
9 3 1
7 3 1 2
7 2 5
7 6 3 4
2 8
6
5 4 3 2
6 9 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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