Printable Hard Sudoku

Set bp4gh6. 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
7 3 9 2
7 2 5 4
5 9
4 6 1
8 4
7 2 5
8 1 7
6 2 4
1 5 9 3 6
Hard #2
9 6 3
8 7 2
1 7 9 3
3 1 4 8
4 5 2
8 1 4 3
6 4 1 5
4 7 9 1
Hard #3
7 3 6 8 2
9
1 5
3 5 2 6
7 9 4 8 2
9 2 1 3
3 6
8 5
4 5 6 1
Hard #4
4 6 1
5 9 7 4
8 3 2
5 1 8
1 9 2
1 7 4
9 8 5
4 3 6 9
6 5 3
Hard #5
1 8 2 7 4
7 9 6
7 3 4 9
4 3 2 1
3 9 5
2
6 4
3 5 8 1 2
8 6
Hard #6
1 6 7 5
9
2 8 3 7
8 5 6
6 2 8 7
4 2
1 9 4 6
4 9 6
1 3 7 9
Hard #7
5 9 7
7 4
9 7 3 5 2
8 2 6
9 3 1
8 1 5
1 3 6
5 4 2 6
7 1 5
Hard #8
7 1 2 5 3
9 4 1
8 1 3
2 7 3 5
1 2
9 6 7 3
7 8 2
7 4
5 6 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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