Printable Hard Sudoku

Set 1l3xbeu. 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 4 9
2 1 3
4 6
6 5 1 2
9 2 1 5
5 7
2 5 4 3 9
8 1 9 4
6 4
Hard #2
6
3 8
1 4 3 9
2 9 5
5 8 7 1
9 2 5 4 6
5 8 6
1 2 7 9 5
9 1
Hard #3
8
1 4 9 2
2 8 7 3 5 4
8 2 5 1 3
5 6
3
7 6 5
4 9 1 6
1 4 2
Hard #4
9 2 4 1 6
4 8 3 5
2 8 3 1 5
3 9 2
1 9 3
2
4 6 7 1
2 6 5 3
Hard #5
7 4
8 1
9 5 2 3
2 7 5 1
4 2 7 6 5
9 5 7
3 4 9 2
1 7 6
8 3
Hard #6
2 4 9 8 1
3 2 6
7 4 1
6 2 3
8 9
9 4
1 2 6 5 3 9
3 7 9
6 3
Hard #7
5 7 9
3 5
6 7 1
2 6
5 2 1 4
1 7
3 8 9 1
9 3 5 1 2 7
8 7 4
Hard #8
6 4 5
7
2 3 8 7 6
9 2
7 3 2 8
1 5 7
6 1
9 2 7 8 1
4 3 2 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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