Printable Hard Sudoku

Set q5ji5p. 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 4 1 8
8 9
8 6 9
5 9 2 6 4 1 8
1 3 9
7 2
4 8 3
6 8
5 7 4
Hard #2
7 9 3 2
1 3 8 6
3 7 9
6 8 5
7 2
9 4 1
3 5 7 4 2
6
7 1 2 3
Hard #3
3 8 9
5 7 6
1 5 4
2 6 1 3 7
3 9
8 2 1
5 3 8 2
8 7 2 5
4 8
Hard #4
3 8 7
4 9
9 3 6
6 7
4 3 8 5 2
5 7 6 1
2 4 9
5 8 6 1
4 7 8
Hard #5
4 1 5 6
2 7 5 8 9
6 3 2 7
9 3 6 5
1 6
3 4 5
8 6 3
4 8 7
1
Hard #6
6 5
2 8 4 1
7 8 1 9
1 9 3 4
2 5
7 8
1 5 2 4 6 8
2 7
6 9 2
Hard #7
8 3 6
9 1 3 8 4
7 9
8 5 2 1
4 8 3
9 7
5 1 6
3 1 2
4 8 9 6
Hard #8
2 5 9
6 7
7 4 3 5
9 7 3 2
4 1 3 8 6
6 2 4 7
4 9
5 2 6
7 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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