Printable Hard Sudoku

Set 1dg0vic. 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 3 9 2
6 5
6 2 7 3
9 6
6 1
3 4 9 7
2 4 8 7 5
7 2 6
8 3 2
Hard #2
4 9 1
7 4 6 5 3
6 1 8 2
2 5 9
4 7 8 9
1 9 6
9 2 4 8
8 7 3
Hard #3
8 1 6
1 9 6 3
5 3 9 1
4 6 1 2
3 6 8
7 8
2 7 6 1 9
1
9 1 2
Hard #4
7 1 2
6 3 9
8 7
4 6
5 3 4 8 2
3 5 8 2 4 9
1
4 6
2 7 9 5 3
Hard #5
2 7 9
2 3 9 8 5
5 4
8 4 7 2
1 8
5 9
9 3 2 6
5 9 4
4 2 3 7
Hard #6
7 8
9 5
5 4 2 7
9 4
8 1 2 7 9
6 7 4 1
4 6 9 8
6 8 3
3 7 2
Hard #7
3 5 4 1 9
6 4 2 7
1
4 9 2 1 7
1 7 8
8 4
9 6 8 1
7
5 2 6 9
Hard #8
2 7 1
1 4 7 3
7 8 3
5 1 2
6 8 9
2 6 9 1 4
6 9 1
4 6 2 3
4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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