Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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