Printable Hard Sudoku

Set te748a. 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
5 7 6 3
2 7 4
8 6 2 3 4 9
7 6 5 2
2 9 6 8
9 4 3
5 7
4 1
Hard #2
9 5 3
6 3 4 1 8
5 2
2 8 9
2 4 3 8 5
7 5 4 1
8 4 9 7
3 1
9
Hard #3
8 7 6 5
3 2 6
4 3 8 7
3 9 8 5
1 3 5
9 7
7 4
4 1 9 6
8 9 6
Hard #4
3 5 7
9 1
1 6 3 2 4
1
6 2 9
4 7 8 6 3
7 6 8 5 4
2 5
1 8 9
Hard #5
7 1 6
9 4
4 6 2
8 3 6
6 5 4 9 7
5
8 7 4 1
2 9 6 7
3 5 2 9
Hard #6
8 9 2 5
7 1 9 4
9
9 6 7 2
8 3 1
1 7 3 6
8 4
2 3 1 9 8
4 2
Hard #7
4 3
1 9 6 8
3 1 6
7 8 4 1
5 9 2
1 8
3 7 9 2 5
2 6 4 9 7
6
Hard #8
4 2
6 7 9 8
8 3 5 1 6
4 3
7 6 8 2 4
5 9 8
4 2 6 9
6 8
3 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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