Printable Hard Sudoku

Set wxs592. 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 4 9
4 2
1 3 6
5 6 9
6 9 4 8 5
3 2
2 3 8 6 7
9 6
8 5 9 2
Hard #2
2 1 7
3 1 5
5 2 9 4
3 4 9
9 7 6
6 4 2 8
6 9
1 5 3 4
2 3 8
Hard #3
5 1 3
2 8 5
8 7
3 4 6
7 5
2 9
6 5 9 3 8
4 1 8 2 9 3 6
3 1
Hard #4
8 3 6 5 1
7 5 2 8
3 1
4 8 6
5 2
9 6 1 4
2 1 9
9 1 6 5
4 3
Hard #5
6 7 1
7 3 8 9 5
1 5 7 4 3
2 9 6 7
3 4
8 1 9
5 1
2
9 6 5 8
Hard #6
5 8 7
8 6 3 7
3 4 5
7 6 1 3 2
3 5 8 2 7 1
8 4 7
5 4
4 7 9
Hard #7
7 3
6 4
5 4 6 9 2
5 2 8
3 9
6 2 3 9 7 1
4 9 6
1 5 7 3
8 5
Hard #8
8 4 2
4 2 8 6 3
9 2 4
6 9 4 2 3
5 7
4 7 5
8 9
4 5 7
1 7 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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