Printable Hard Sudoku

Set zve1ea. 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 2 8
3 4 2
8 4 3
4 2 5
6 8 5 9 4
7 4 1
4 6 1 2
8 9
5 1 3
Hard #2
9 1 6 3
8 4
3 7 6
7 1 5 2
7 8
6 5 2 3 4
3 4
5 2 6
9 1 8 5
Hard #3
2 6 8
7 2
5 4 3 7
6 9 3 8
1 8
7 3
8 5 1
9 2 7 1
4 2 6 3 7
Hard #4
9 1
3 6 7 2
2 6 3
2 1 9
4 7 6
2 1 5
7 5 8 3
3 4
4 1 3 2 8
Hard #5
1
6 7
9 3 1 8 2 7
1 4 8 2 5
6 7
9 5 7
8 5 2 9
7 3 4
1 8 2
Hard #6
4 1 7 6
7 6 4 2
3 8 6
6 2 4 9
5 9 7 8
7 5 2 3
9 2
1 9
7 5
Hard #7
2 4 7 6 9
9 3 5
8 6 3 4
5 8 7
9 7 4
7 1 5 2
7
1 6 5 4
2 9
Hard #8
4 9 5 7
7 3 2
5 1 8 6
8 3
1 2
6 4 9 8
1 3 8 6
2
8 6 2 4 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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