Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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