Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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