Printable Hard Sudoku

Set 1fb2ya7. 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
8 6 9
9 3 2 8 5
4 8 6
1 6
8 7 4 1
6 2 9
1 4 8
9 8 3 2
7 8
Hard #2
7 9 3 4 8
2 9
1 5 7 2
3 2 4 5
7
9 1 3
2 4 5
4 3 8 9
5 1 3
Hard #3
4 5 2
2 5 9 8
8
4 7 6
7 9 4
4 2 6 1 9
6 3 4 2
3 9 4 1 5
9
Hard #4
8 5 1 6
7 8 9 1
8 7 1 9
6 3
3 4 1
4 1 2 6
7 8 5
5 7 9 4 8
Hard #5
1 2 7
3 6 2
5 8 1 4 7
9 5 4
6 3 4 8 1
1 9 5
4 5 8
8 7
9 3
Hard #6
9 1 7 3
3 8 9
1 7 6
6 3 8 1
5 4
9 3 4 1
2 8
7 9 5 2
5 8 7
Hard #7
7
3 6
8 4 6 1 3 9
7 6 9
6 5 9
9 4 7 3 6
7 6 1
2 4 8
6 5 2
Hard #8
5 8 6
6 2 7 5
1 4
7 1 4
1 2 8 9
5 6
5 3
4 6 7 2 5
7 5 1 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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