Printable Hard Sudoku

Set t3y03g. 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 7 5
9 4
4 6 3
1 2 3
4 6 1 9
4 3 1
4 7 8 6
8 1 7
9 6 5 3
Hard #2
3 9
9 7
1 6 3 2
8 9
6 9 7 4
7 3 5
1 4 6 3
2 5 1 8 6
5 6 3
Hard #3
9 5
7 8
1 2 7
1 2 5
9 6
6 8 1 5 7 2 3
3 8 4
9 3
7 8 2 1 5
Hard #4
4 8 2 9
6 5 2 1 3
8 7 4 9
2
4 5 8 6
2 8 7
5 9 8
8 6 5 9 4
Hard #5
5 9 7
3 7 5
4 3 2
8 2 1 3
7 2 5 3
9 6
5 1
2 4 3 8 6
1 7 9
Hard #6
6 1
8 9
1 5 2 7
1 4 2
7 5 8 3 9
8 3 2 1 5
1 7 5 6
3 6 1
8
Hard #7
4 9 5
6
8 2 9 3 1 5
3 1 9
2 5 7
6 2 7
3 7
5 1 8
9 4 7 2 6
Hard #8
4 1 8
6 5 2
5 3
4 9 1
6 8 7 1 2
9 7 5
5 7
1 3 6 2
3 9 7 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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