Printable Hard Sudoku

Set 13ibjh3. 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
3 2 8 1
2 6 5
1 7 5 9
8 2
5 9 2 8 4 7
9 1
6 9
7
1 4 5 9 6
Hard #2
6 2
3 4 5 2
5 9
3 9 2
8 7
8 2 4 3 9
2 9 8 6
9 6 4 8
6 7 5
Hard #3
2 9 5 1
9 8
4 7 1 6
9 2 3
1 3 2
2 6 4 7 8
3
8 2 4
1 7 4 5
Hard #4
4 1 7 2
9
3 5 2
3 6 7 4
4 5 6 1
1 9
6 5 2 8 4
7 5
2 3 6 8
Hard #5
6 7 2 5
2 9 8 1 7
3 5 8 6
2 5 4 9
1
1 4 6 8
1 9
8 7 3 2
9
Hard #6
9 5 6 3
8 9 4 7
4 2 5
1 5 6 9
2 5 8
1
8 9 7 1
7 8 3 6 9
4
Hard #7
2 7
8 6 3 5 1 2
1 3 6
1 5 9 4
3 9 7
6 8
4 9 5
2 7 9 1
6 4
Hard #8
5 6 3 2
9 2
5 1 7
6 1 9
8 1 4 3 6
4 7 8
4 9 1
3 8
6 8 7 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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