Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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