Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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