Printable Hard Sudoku

Set amuq4r. 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
2 7
2 6 5
7 1 4 8 3
8 1 5
3 8 4
9 1 7
8 3 9 7
5 6 2
9 2 5
Hard #2
7 9 2
4 8
8 3
4 1 5
9 2 7 3
9 3 8 2 4
9 6 2 5 1
3 1
1 7 9
Hard #3
9 5 4 3
7 3 2 1
6 3 8 7
7 8 3 4 6
1
1 6 5
8 7 3 5
4 7 2
4
Hard #4
9 7 8 3 1
9 1
6 8 4 7 3
7 8 4 2
6 2
4 8
1 4 5
1 9
7 4 5 2
Hard #5
8 5 1 6 7
6 1 8
3 5 4
3 5 6
4 3 9 7
9 1 2
6 5 8
7 2 6
9 1
Hard #6
3 2 6
6 8 7
1 6 9 5
7 5 2
6 9 2 5 1
5 7
8 4 1
9 6 5
9 8 3
Hard #7
8 6 4 5
9 5 1 7
5 8 3
3 8
2 5
2 6 4 3
9 7 6
4 6 9
2 1 7 4
Hard #8
2 9 8 5 1
4 3
8 6 9 4
7 1 8
8 5 6
2 5
3 4
1 6 7 9 2
4 1 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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