Printable Hard Sudoku

Set 1gsb09h. 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 6 3 8
5 4
3 8 7
8 4
2 3 5 6
1 8 3
9 7 5 1
2 9 5 3
7 6 9
Hard #2
8 7 5
4 6
2 7 1 3
3 2 7
6 9
9 5 8
6 2 9 4 1
8 5 7
9 2 6 8
Hard #3
6 9 8 2
6 3
9 1 7 6
1 6 3 5
6 1 7
7 5 4
8 5 9 2 3
7 1 3
2
Hard #4
3 5
2 1
9 5 8 6 3 4 2
5 1
7 3 1 6 9
7 9 6
4 5 8
3 6 1
1 2
Hard #5
2 1
3 8
2 5 6 3 1 9
6 7 2 5 1
9
5
6 3 8 9
7 9 2 6
4 2 6 8
Hard #6
3 4 8
1 6 3 7
6 7 4
1 3 7
3
2 8 6 1
4 2 6 5
2 7 4 9
6 8 1
Hard #7
5 9 7
2 4 9 7
1 9 8 6
4 1 3 7
6 5
5 2 4
2 7 8
4 7 3 9
3 6
Hard #8
4 8 9
2 1
4 3 8 6
9 2 4
7 6
3 4 6 9
8 2 3 6 4
9 5
6 7 9 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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