Printable Hard Sudoku

Set 1k1f1jd. 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 3 1
1 2 5 6
6 9 5
7 9 3
2 3 5 7
4 5 9 8 1
1 8
4 9 2
7 3
Hard #2
3 9 6
3 7 5 2
5
7 3 4 6 2 9
9 6 7
1 7 8 5 3
6 7
1 8
4 8 2
Hard #3
3 7 6 1 2 5
7 5 3 4
5 2 8
8 3 5 6
9 1
5 7
4 1 8
5 7 9
2 3
Hard #4
8 3 2 5 6
9 1 7 8
9 7
5 2
1 8 9
7 3
6 5 4 8
4 1 9
2 7 4 3
Hard #5
1 8 9
8 9 5 2 1
7 2 6
3 7
9 4 3
8 6 2
2 3 7
1 3 7 8
4 5 9
Hard #6
6 7
9
5 9 2
5 6 8
7 3 1
8 3 2 4 5 7
7 5
1 9 8 3
6 2 9 1 5
Hard #7
1 5 2 3
2 9 5
3 5 6
2 1 5 8
6 9 2
5 3
8 7
5 2 3 4 6
9 1 7
Hard #8
8 7 5
7 2 9 5 1
1 5 6
9
6 3 1 8
8 6 5 7
1 3 5 7
2
9 5 4 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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