Printable Hard Sudoku

Set vsr24l. 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
7 3 2
4 6 3
6 7 1
6
8 4 9 5 7
2 3 8 7
4 9 5 7
8 4
5 7 9 1
Hard #2
2 7 3 5 1
1 9
4 6
4 8 2 5
1 8 5 9 4
9 1
4 6 2 9
7 8
9 7 2
Hard #3
8 7
6 7 9
9 1 4
4 2 8 1
7 8 3 2
1 9 4 3 7 8
5 6 1
6 3
1 9
Hard #4
5 6 9
3 7 5 4 1
4 1 6
5 9 1
8 2 9
1 8 4
2 8
5 9 7
3 1 7 2
Hard #5
1 8 3
2 3 7 1
8 9 4 2
8 3 4 5
9 2
9
2 5 4 9
2 7
6 5 1 7 3
Hard #6
5 9
3 1 4 7 9
1 7 5
6 3 9 7
7 2 5
2 6 3
5
8 4 1
9 6 1 8 2
Hard #7
7 8 3
9 3 2
1 4
6
7 3 5 9 1 6
4 3 7 9
3 8
9 4 3 8 1
1 7 6
Hard #8
8 9 6
4 1 9
5 4 2
7 1 8 5
6 3 2 1
4 5 6
6 1
3 8 7
6 1 2 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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