Printable Hard Sudoku

Set 197ea77. 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
9 7 1 2
6 1 8
3 7
9
6 5 1
3 5 8
5 2 7 8 1
7 2
8 4 6 5 7 2
Hard #2
9 1
3 4 7 6 5
8 2 3
4 9
5 2 6 9 8
9 5
8 2 6 1 7
5 2
3 8 7
Hard #3
4 1 6
3 4 7
5 2 7 9
8 2 5
3 8 9
6 2
2 9 6 7
1 2
2 1 3 4 6
Hard #4
4 7 1 2 3
5 7
9 2 8 7
1 2 6
5 8
4 1 9
7 6 4 8 2
1 2
5 6 3
Hard #5
1 2 7
1 8 4 5 6
8 3 9
4 6 2
6 3 2 5 1
5
8 4 6 9
1 7 4 8
7
Hard #6
5 8 7
3 6
7 1 9 5 8
2 4 3 8
1 4 5
2 1
5 4 2
3 2 8 7 4
7 3
Hard #7
8 5 6 3
2 7 1 8 3
7 4 9 2
1 5 7
4 2 1
9 7 8
7
4 2 5
5 8 1
Hard #8
3 4 6
1 5
8 1 3
1 4 5 8 3
2 7 8 9
9 6
9 8 2
7 9
6 8 3 4 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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