Printable Hard Sudoku

Set mra7g4. 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
5 9 1 2 8
1 7 4 2
4
3 8 6 9
8 5 2
7 5
8 7 4 3 5
4 2 3 9
3
Hard #2
3 5
8 5 9 4
7 3 4 1 2
8 9 4
3 6 8
5 2 7
5
9 7 1 6
8 6 5 1
Hard #3
5 2 7
9 3 7 4
3 1 5
6 5
7 3 9 2
7 6 4
1 8 4 7 6 2
9
8 4 2
Hard #4
3 4 1 6
8 1 2 5 4
5 9 1
6 7
3 1 5
8 1 2 7
9 2 3
5 4 6 3 2
Hard #5
5 9 4
5 1
7 5
8 9 6 2 1
6 3
2 4 7 8
1 8 3
8 1 5 2 6
3 7 5
Hard #6
2 4 7 6
3 7 9 4 2
5 1 9
9 3
5 6 9 1 2
9 5 7 1 6
6 7
3 8 6
Hard #7
7 9 2
8 7
4 3 6
8 5 2 1
7 9
7 1 5
2 3 9 4 5
4 9
6 5 9 2 1
Hard #8
1 2 4
9 8 5 6
5 1
7 5 3
8 7 9
4 3 6 1 5
8 1 4
3 8 5 9
6 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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