Printable Hard Sudoku

Set j5b2x. 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 1 5
3 9 5 7
4 7 6 8
7 4
2 6 4 7 1
3 1 7 2
8 5
9 3
8 2 1
Hard #2
4 9 1
7 2 6 1 3
6 5 9 7
2 1
9 6 5
7 2 3
4 3 5 9
4 6 8
4 1
Hard #3
7 5 3 2 6
9
4 2 5 7 1 9 3
4 5 2
3 7
1 6 9
4 9 7
7 5 8
6 5
Hard #4
1 7 3
8 2 4 9 7 5
9 2 1 8
8 5 9 3
7 9 8 2
3 7
4 1
4 3 5
1
Hard #5
3 8 1 5
4 2 6
5 8
9 6
5 6 8
1 2 8 5
4 8 7 3
5 9 8 2
6 2 9
Hard #6
7 4 9
3 9 2 4
2 6 7 5
9 3 7
7 3 8
6 8 2 1
1 3 6
4 1 2 6 7
Hard #7
6 4
4 8 7 3
1 2 4
3 7 9 6 1
6 5 7 4
8 6
9 6 5
5 3 8
3 9 2
Hard #8
4 1 3 2 8
2 6 7
7 1 4
4 5 1
4
7 8 6 1 3
1 9 6 3 5
8 2 4 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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