Printable Hard Sudoku

Set pal6fr. 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
4 5 6 1 8
2 3
7 8
1 4 7 3
5 6 1
3 5 9
7 5 4
3 7 8
5 2 3 4
Hard #2
4 7
5 1 6 4
3 7 1 5
1 9
1 6 7 4 3 2
7 5 1
1
8 3 4
6 8 9 3
Hard #3
7 3 2 9 4
4 6
1 7 3 5
6 2 8 5
2 3 9 6
9 1 7
8 9 3
6 7
3 7
Hard #4
4 2 1
4 8 1 7 5
8 9
5 6 9 8 3
7 5 4 1
7 3 6
6 4 2 9 7
3 7
Hard #5
8 1 3
2 7 4
3 6 4 7 9
5 4 7 9 1 2
8
7 3 1
4 5
1 9 8
9 3 7
Hard #6
1 4 2
7 6 8 1 9
4 3 7 6
9 8 7
5
7 2 3 6
3 6 2 9
8 9 6 5 2
Hard #7
5 8 3 4
6 9 8
2 4 7
8 3 6
4 5 6
9 7 2 4
8 7
4 5 7 3
8 6 9
Hard #8
6 5 7 1
9 4 5 2 3
8 6
4 6
2
5 9 1 7 4 2
3
2 6 3 5
7 5 3 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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