Printable Hard Sudoku

Set 1ng02wx. 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 2 8 9
2 9 6 5 4
6 2
1 6
9 3 1 2 7
4 5
1
3 7 8 1
8 4 6 3
Hard #2
5 1 7 6
2 3
3 2 7 1
6 9
1 4 3 7
3 9 5 4
4
4 8 5
6 5 9 1 3
Hard #3
1 2 8
6 7
3 4 5 2
3 2 1
5 4 6
4 9 5
5 4 8 7
1 3 2 9
6 8 3
Hard #4
2 6 4
1 5 8 9
2 8 7 6
6 4 1 3 2
1 7
3 2
1 6
9 1 4 5
8 7 5
Hard #5
6 9 3
4 9 5 2
8 1 7 4
8 3 9 2 1 5
6 2
9
8 6
2 4 7 6
4 3 8
Hard #6
1 4 7 6 5
6 9
8 7
5 4 3 7 9
6 9 2 1
9 1 8 4
5 3
3 5 7
7 8
Hard #7
1 6 3 9
6 4 9 8 1
3 5 1
7 1 5 9 6
8 1
8 3
7 2 1
2 5 6
9 7
Hard #8
5 4 9 1 8 7
3
1 9 6
8 5 1
9 7 1
6 4 2
6 2 9 7
5 8
3 9 6 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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