Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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