Printable Hard Sudoku

Set 10zvz9g. 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 1 5
2 4 3
6 3 5 8 2
1 3 8
9 7 4 5
4 8
2 9 7
1 4 6 3
2 1
Hard #2
6 2 4 3
7 4 5
5 8 7
5 6 8 2 4
9 8 5
1 8
1 2 3
9
7 5 4 3 2
Hard #3
6 8
2 3
4 1 5 9
9 1 5 6
5 7 9 2
9 2 8 4
2 9 7 1
1 6
4 2 5
Hard #4
1 4 3 8
5 6
7 8 1
7 5 9 4 3
3 2
5 7 8 9
5 3 4 8
4 9 2
2 1
Hard #5
1 8 2
2 3 5 6 8
3 9
1 7
3 7 9 6
7 6 5 3
2 6 1
4 7
5 6 1 3
Hard #6
7 6
5
7 1 9 3
5 4 9 1
4 8 6 3
1 2 8 6
5 8
7 4 9 8 2
2 6 9
Hard #7
3 8 5
4 5 8
7 5 9 4 6
7 9 1 3
4 2
7 6
7 5 1
9 5 8
6 4 7 2
Hard #8
4 1 8 6
2
6 9 2 1
9 7 5 8 4
5 4 9
7 8 3
5 7 1 4
2
3 7 9 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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