Printable Hard Sudoku

Set 119ig81. 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
3 4
3 7
4 6 5
5 1 4 6 8 7
8 9 4 3
8 2
9 5 1 6
8 3 5 7 9
7
Hard #2
8 1
1 8 7 6 2
9 3 4
6 3 8 4 7 1
1 2 7
9 2
5 2 9 3
6 7
6 9
Hard #3
8 9 6 7
9 4 5
3 5 7 6
5 6 3 9
1 7
6 8 5 2
7 2
3 8 6
9 1 3
Hard #4
2 3 5
4 7 2
6 7 9 5 3 8
2 5 6 8
9 1
7
7 3
1 3 2 7
9 6 4 1
Hard #5
7 1 2
4
8 1 9 6 5 3
9 3 8
1 5 6 7
7 1 9
6 8 4 7 3 1
3 4
6
Hard #6
6 9 4 2
5 8 4
8 3 1
6 3 8 4 9
4 1 6
2 1 8
7 5 2
5 8 7 3 4
Hard #7
5 8 7
2 4 9 6
9 8 2
4 3
8 1
1 9 3 8 4
3 7 9 1
4 6 5
9 5 7
Hard #8
8 4 1 9
7 4 8
7 2 5 4
7 9 8 3 4 5
2 6
2 9 1
7
5 8
7 1 3 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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