Printable Hard Sudoku

Set 1ho2kxj. 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 5 8 1 6
1 2 9 5
4 1 7 8 2
9 4 2 1
9
5 2 7 9
6 3
8 1
9 4
Hard #2
7 4 8 3
1 7 5
9 3 2 7 1
5 1
1 2
2 4 6 9
6 7 9
8 5 3 2
9 1
Hard #3
9 5
9 8 2
1 7 9 6 3
2 7 5 8
3 7
3 6 9
6 2 5 1
2 3 5
1 7 2
Hard #4
2 5 1
7 2 6 3
6 7 4
8 5
9 2
1 9 3 7
3 9 4
6 4 3 2
5 9 6 8
Hard #5
2 6
2 9 3 1
3 5 6
3 9
9 6 8 3 2
5 1 6 8
1 5 3
1 4 9 2
3 2
Hard #6
7 6 1 5 2 8
5 8 7 4
8 6
9 3 5
5 1 6
9 6 5 2 3
5 1 9
4
2 6
Hard #7
4 9 6
9 1 2
6 1
8 2 9
5 8 1
3 5 9 1
7 4 1 5
2 3
1 3 8 7 2
Hard #8
3 8 9
8
4 5 6 8
5 3 7 9
6 1 3
9 2 6 1
3 4 5
4 3
9 7 1 4 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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