Printable Hard Sudoku

Set 6wx069. 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
1 7 5 9
4 5 8 6
2 6
2
5 7 8
4 7 3
3 1 7
7 4 2 3
5 3 1 2 4
Hard #2
5 1 3 7
1 6 2
4 6 2
7 1 9
9 5 6 2 1
4 8
3 7 8
7 5 9 8
6 1
Hard #3
5 6 3
7 2 5
9 2 8 6
5 6 3
6 2 7
7 8 9 5 6
5 1 7
2 4
7 8 9
Hard #4
8 9 5
1 2
9 6
6 4 8 7 2
4 8 1
5 3 6
8 4 1 2 9 3 5
2 6 8 1
Hard #5
7 5 3 8
9 1 6
3 8 9 1
4 7 6 1 9
5
5 3 8
9 2
8 5 3
2 4 7 1
Hard #6
1 5 7
6 1 9
2 5 7 6 4
5 6 8 1
8 6 5
7 9 3
1 6
9 1 3
1 4 5
Hard #7
9 3 2 7 4
1 2 6 7 8
4 9 6
9 6
4 9
1 6 8 4
3 9
6 2
7 6 5 3
Hard #8
3 9 1 8
8 6 5
2 7
9 1
6 1 9 5 8
2 9 8 1 4
7 2
7 1 4
1 5 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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