Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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