Printable Hard Sudoku

Set 1y302y0. 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
3 1 5
5 3 6 2
6 4 9
1 7 2
2 9 6 8
9 8 3
1
9 8 4 3
6 5 8 2
Hard #2
2 6
6 7 1
1 3 9
3 9 7 4
9 6
7 4 1 8
8 5 7 4 6
1 8
4 5 8 3
Hard #3
8 3
9 3 7 5
5 3 2 8 6
5 9 2
2 8 3 6 4
1 6 8
8 9 4
9 7
3 2
Hard #4
2 7 8 1
6 3 5 4
6 9 3
8 1 4 6
5 2 8
6 7
9 2 5
1 3 7
5 3 8
Hard #5
2 3 7 8
3 7 5 9
5 6
6 9 8 2
8
2 3 1
7 8 9 3
5 6 7
6 7 4 9
Hard #6
3 9 7 8
6 2
1 2 3
9 6 7 4
1 5 4 9 2
2 7
5 8 3 9 6
6
8 3 7
Hard #7
3 2 8
5 6 9
4 8
6 7
2 6 8
2 3 4 1
3 9 2 4 7
7 5 3 2
5 3 6
Hard #8
9 1 8
1 7 4
8 7 5
5 7 4
1 3 2 8 5
6 8 5
5 4
9 2 6 1 4
3 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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