Printable Hard Sudoku

Set vy9pvq. 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
4 6 1 7
5 9 3
4 6
9 1
2 9 8 7
4 3
6 9 8
4 8
5 7 8 2 6 9 4
Hard #2
2 4 5
5 8 7 6
4 7 9
6 9 7 1
2 6 8
5 1 3
2 9 4 7
5
7 4 1 8
Hard #3
4 2 8 9
6 5 1
8 9 3 5
4 7 9
3 7 1
5 6 3
2 4
7 6 2 9
2 7 8
Hard #4
5 7 2 6
4 9 7 1
7 3
8 3 7 1 9
1 3 4
5 2 8 7
6 7
8 5
2 6 9
Hard #5
3 7 2 1
2 4 7
1 5 7 3 9
8 6 2 3 1
3 9 6
4 1 5
9
2 7
2 8 5
Hard #6
8 6 4 7
6 5 8
3
1 4 9 3
5 6 2
8 6
2 3 6
6 3 1 9 2 7
9 6 3
Hard #7
3
4 1 8 9
9 4 5
7 1 4
7 6 2
4 5 6 1
1 3 8 2
7 6 1
5 3 7 2
Hard #8
3 1 8 6
9 4 7
9 4 2 5
1 2 4 6
7 5 8
9
8 1 9
1 9 6 7 3
7 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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