Printable Hard Sudoku

Set 1wgg8wu. 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
7 4 8
3 4 1 7
6 9
6 9 1
2 9
1 7 4 3 9
3 1 2 5
5 2 6
2 6 1
Hard #2
8 9 6
7
1 3 5 2 9
7 4 3 2 8
1 7 5
9 6 8 4
6 2
7 2 1
4 7 6
Hard #3
3 7 6
3 2 5 1
9 8 6 5
1 6
2 6 1
4 8
6 9 3 5
2 8 4 3
9 6 8
Hard #4
3 5 6
1 4
1 8 2
7 4 9 2
6 1 2
9 1 3 4
7 1 9 3
3 2 8 4
2 7
Hard #5
7 4 3 9
2 3
1 8 6
6 8 2
9 3 1
5 2 4 7
5 2 3 1 6
7
2 1 7 5
Hard #6
8 5 9 4
9
7 3 6
5 4 2
9 4
8 3 1 2
3 5 4 6
7 1 5 2
2 9 3 8
Hard #7
3 9 2 5
9 2 8 6 7
8
7 3
5 4 6 7 8
8 3 1
5 2 6 9
4 3
6 7 5
Hard #8
4 8 1 7
2 3 5 4
4 9 6 2
6 9 7 3
8 1 9
9 8
6 5
2 5 4 9 1 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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