Printable Hard Sudoku

Set vnh5hz. 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 1 4
9 7
3 1
7 9 3
9 7 4 8 3 2
8 4 7 9
9 5 6
4 6 2
5 3
Hard #2
7 5 1
8 7 4 9 3
6 5 7
6 7 2
4 1 5
5 9 3
9 1
2 9 7 8
1 5 4
Hard #3
8 3 2 1 7
4 9 1
1 8 3 4
2 6 9
5 4 8
9 6 5
5 9 2
6 1
3 2 7
Hard #4
6 5 2
2 3 9 8 5 1
1 2 3
7 2 5 4 8
3 9 2 7
8 3 1 7
2 8
1 2
Hard #5
1 8 2 3
6 5
8 9 6 1
5 1
9 7 3 8
8 3 5 6
1 4 9
6 7 8
4 2 6
Hard #6
5 6 9
2 1 7 3 5
8 2 5
5 1 2
9 5 6
2 6
3 8 1 4
7 8
9 4 7 2
Hard #7
7 6 9 8
1 6
8 5
4 3 5 2 1 6
8 9 4
1
3 7 8
9 2
7 1 2 8 3 4
Hard #8
6 2 3
1 5
8 9 7 5
9 6 1
5 7 9
7 8 1
3 5 4
5 1 9 7
4 3 5 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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