Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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