Printable Hard Sudoku

Set wxg07e. 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
5
4 6 7
9 7 1 6 8 5
9 2 7
4 7 1 9 6
3 1 8
1 3 4
7 4 5
2 7
Hard #2
5 8 3
6 5 1 4 9 7
8 4 3
7 9 4 6 1
7 3
1 2
2 4 7 5
8 9 5 6
Hard #3
2 7 6 8
7 5
8 1 4 2
6 5 7
3 9 4 8 1
9 4
4 1 6 3 2
6 4
5 2
Hard #4
2 1 8
7 5 8 3 9
8 6 7
7 8
2 3 5 4
1 4 5
9 5 3
6 2
5 4 9 2
Hard #5
5 4 1 7 6 9
8 1 5
6 4
4 9 6 3 1
1 2 9
8 3
3 5 2
8
4 2 1 8
Hard #6
7 9 3
5 3 4 9
1 3
4 9
4 2 8
1 6 5
3
5 2 4 6 7
9 6 8 2 5 1
Hard #7
9 2 6
5 8 2
7 4 5 3
1 3 2 4 6
8 7 9 3
6 8
6 4
2 4 6 1
9 8
Hard #8
6 8 7
7 1 3 9 4 2
2
4 2
3 1 9 5
2 1 8
2 7 4
2 9 6
4 5 3 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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