Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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