Printable Hard Sudoku

Set 10tbfmw. 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
5 3 9 6 8
9 8 4 1 5
5 1 7
4 2 6
7 3 4 5
9 7
1 2 9 6
5 6 9
Hard #2
7 8 2
4 2 8
1 4 5 9
3 5 9 2
8 4 1 6
4 3
6 4 5
5 2 1
3 9 7
Hard #3
9 1 4 8
8 7 9 2
3
7 2 9
9 2 5 1 7
8 5 1 4
4 6 9
3 2 7
1 8
Hard #4
4 5 9 7
2 4 7 6
9
6 7 9 4 8
8
3 6 1 5
5 6 7 9
9 4 2
1 8 5
Hard #5
5
1 6 2 4
5 2 7 1
6 8
3 5
4 9 7 6
9 4 5 3
9 8 1 7
8 6 3 4
Hard #6
2 8 4 7
9 3 4 2
2
2 1 9 5
8 6 1 4
6 5 3
9 5 4 6 8
2 7 6 5
Hard #7
1 2 5
5 9 2 7 4
4 3
6 3 8
9 5 2 4
7 5 2
9 6 7
5 3 1 9
1 3
Hard #8
6 7 8
3 1 6
9 4 3 2
1 3 9 5
3 6 8
2 4 9 6
6 7 5
2 4 1
5 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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