Printable Hard Sudoku

Set oq3qkj. 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 5 8
6 1
7 2 8
9 5 4 3
3 6 4
7 4 3 2
5 4 6
2 5 3 8 1
6 5
Hard #2
1 7 4
7 1
5 3 2
3 5
7 6 1 3
3 9 2
1 2 6 9 5
6 2 4 9
8 1 4
Hard #3
7 3 2
8
1 4 9 6
4 3 6 5
6
7 3 4 1
8 5 7
9 6 2 1 8 3
7 8 9
Hard #4
8 1 2
3 2 5 4
5 8 9
8 4 6 2
7 5 9 1
2 8 7
6 8 1 5
2
1 2 9
Hard #5
2 5 8
7 3
4 1
8 3 7 6
4 7 8
1 5 7
1 6 2
9 6 3 4 5
1 7 8 4
Hard #6
7 1 4
1 6 8 3
3 2 6
5 1 6
2 8 9 5
1 6 3 8
5 9
9 1 2
6 7 9
Hard #7
9 3
2 8 9 4
6 5
2 1
8 4 3 9 2
4 6 8 3
3 7 4
1 6 9 7
7 2 1
Hard #8
4 2 5
3 8 6 4 2
2 7 4
2 3 5
5 6 9
7 1 5
2 4 9 3
1
6 9 8 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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