Printable Hard Sudoku

Set vb05se. 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 4
1 4 9 7 2 5
3 7
7 1 6 5 3 9
3 8 6 2
2 1
4
5 6 4 2
6 7
Hard #2
9 4 5 1 6 7
6 7 9 4
5 6 8 9 3
5 8 2
2 9 4 7 5
1 8
2 6 7
4
Hard #3
7 3 1 4 5
5 6 3
5 1 9
6 7 9 4
3 7 1
2 1 6
8 5 6 1
7 2
2 5
Hard #4
2
2 3 6 7 5
5 4 6 9
9 3
6 3 8
7 2 4 1
7 2 1 8
4 8
8 5 2 7
Hard #5
1 3
9 6 2 4 7
3 4 5 8
4 8 5 9
5 6 3 2
7 1 4
9 2 6
8 5
4 7
Hard #6
6
3 1
2 1 7
5 7 2 4 8
6 2 5 3
8 4 3 5 1
4 2 1
1 3 8 5
5 6
Hard #7
6 3 5
9 7 6 4 2
5 1 2 9
2 4
9 8 1
3
7 6 5 3 9
3 4
9 8 3 2
Hard #8
4 7
7 5 3 9
3 9 7 4
5 8 3 6 2
8 3 4
4 6 5
1 9 5
1 7 6
6 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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