Printable Hard Sudoku

Set 1los5ba. 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
6 7 9
5 2 6 4 7 9
8 4 5 1
2 9 1
1 6
4 5
6 7
9 3 1 2
4 7 3
Hard #2
2 9 6
7 3 5 9
6 5 8
7
5 3 4 7 1
1 3 6
6 2 4 8
2 7 9
8 5 4
Hard #3
3 7 8 9
4 2
2 5 7
7 8 5
8 5 2 4 6
6 3
9 3 4
1 4 8
8 9 5 7
Hard #4
4 5 2 7
7 4 9 1
9 7
6 8 1
8 9 4 6
2 1 5
8 4 6
1 7 2
7 1 4
Hard #5
7 4 3 1
8 7
3 9 2
9 4 2
9 6 8 5
4 2 3
9 6 7 1 4
2 9 7
6 5
Hard #6
1 4 8 9 7
7 9 5
8 6 4
2 6 1 3 4
5 2 8
4 7
5 8 3
6 1
4 5 2
Hard #7
8 6 3 1
4 2
1 5 9
2 5 1
7 5
9 8 3
3 9 6 7
4 6 1 8
7 4 3 6
Hard #8
3 2 8 7
1 2 8 9
4
4 7 9 6
5 2
9 1 3 5
5 4 1
2 7 3
8 4 1 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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