Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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