Printable Hard Sudoku

Set 1j8xwr0. 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
9 3 7
1 7 9 5 3 2
8 5 7
1 3 6
2 7
3 2 4 8 9
5 7 3
4 8 3 6
Hard #2
2 5 7
3 1 7 4
5 4 6 8 1
5 4 3 6
6 2
2 1 7
2 6 4 5
8
1 8 4
Hard #3
1 8
5 6 2
7 3
9 4
4 6 9 3 2
1 4 7 8
7 8 2 9 4
8 4 5 1
1 3
Hard #4
2 5 7
4 1 6
5 1 2 4
6 2 1 8
4 8 5
4 9
7 6 2 8
8 2 5
9 5 7
Hard #5
2 7 6 3
6 5
9 1 7 6
7 4 1 8 3
2 8 9
5 4
1 6 2
8 1 4
4 5 8
Hard #6
3 1 6 2
6 9 4
9 4 2
5 7 8 6
8 3 2 5 1
7 4
2 3 7 8
6
1 2 5
Hard #7
4 1 5
2 4 3
6 3 5 8 2
1 3 8
9 7 4 5
4 8
2 9 7
1 4 6 3
2 1
Hard #8
6 2 4 3
7 4 5
5 8 7
5 6 8 2 4
9 8 5
1 8
1 2 3
9
7 5 4 3 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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