Printable Hard Sudoku

Set 1y1hgep. 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
4 1 2 6
5 1 3 7 2
9 8
6 7 5 3
2 7 1 5
8 5
9 3 2
6
7 1 3 8
Hard #2
9 7 1
5 7
1 4 5 6
6 5 2
5 6 2 1 9 7
9
4 6 5 7
8 7 6
7 4 3
Hard #3
2 8 3 7 9
4 6 8 3
5 9
1
1 5 8 7 9
6 9 8
4 7
6 3 9 5 1
2 6
Hard #4
3 7
8 4 5
9 8
6 2 4 1 3
8 3 6
3 4
1 9 4 7
4 6 5 3
8 7 5 2
Hard #5
2
8 2 7 5 9 1
7 9
4 9 6
1 5 8
6 1 7
4 8 7
2 5 9 8 6
9 4 5
Hard #6
5 8 1 9 6
7 5 9
6 8 3
9 8
2 3 7 5 9 1
1 3
5 9
3 7 2
1 2 6
Hard #7
3 8 6
8 6 9 4
7 9 5 3
1 8 5
1 3 2
6 9 2
8 5 2 9
2 6 1 7
4
Hard #8
2 5
1 7 8 2
3 7
5 7 9 1 2 6
4 5 3 9
6 7 4
3 1 8 9
6 5
4 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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