Printable Hard Sudoku

Set n1p7jl. 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 6 3
8 4 5 3
5 8 4
5
5 6 3 2 1 4
9 6 8 5
4 2 9
1 8
7 8 9
Hard #2
3 2 5 8 6
5 9 8 7 3
3 1
1 7 9 6
9 5 6 2
2
7 1 3 8
1 6 9
8
Hard #3
4 3 9 6
6
6 9 1 5
8 2 7
3 1 4 8
2 1 5
8 2 9 5
7 5
4 2 1 8
Hard #4
2 6 5
9 7 6 4
3 1 9 8 7
2 5
6 1 7 4
9 3 6 8
5
7 6 8
2 8 3
Hard #5
5 1 2 7
4 7 9
6 1 3
7 9
8 9 2 4 3
9 7 6
9 8
1 2
5 7 6 9 8
Hard #6
6 2 7
7 1
1 3 8 2
5 7 1
6 9 3 1 5
2 6 3 9
6 3 1 4 5
5 2
7
Hard #7
4 6 3
3 9 5 4 7
1 3 2 8
7 6
9 6 8 2
4 5 7
5 8 9 1
6 4 2
2
Hard #8
4 9 6
3 8
6 5
8 2
3 4 6 1 8
7 9 1 5 2
3 7 2
8 1 7
7 2 5 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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