Printable Hard Sudoku

Set xd1eki. 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
3 4 8 2
2 3 1
2 8 9 4
7 9 6
3 6 4
1 9 4 5
3 9
5 6
2 3 8 1
Hard #2
4 5 1 9 3
5
9 2 1 7
9 8 5
1 8
1 9 6 4
6 8 2 1
9 1 3 8
2 7
Hard #3
9 3 2
6 8 9
1 5 4
1 3
9 2
8 3 6
5 2 6 4 1 9
3 9 5
8 2 5 4
Hard #4
6
4 2 8 9
3 1 5 2
4 8 6
3 5 1 9
9 5 7
8 6 2 5
9 4 7
1 3 4
Hard #5
8 9
1 4 6 8
3 1
2 3 4 5
8
7 9 6 3
5 7 6 2
2 4 8 6 5
1 2 7
Hard #6
7 3 4
3 1
9 2 1 8 3
2 4 7 6 3 5
6
8 1 5 9
3 2 6 4
8
5 4 9
Hard #7
2 6 9 7
6 9 4 3
5 1
1 4
2 9 6 4
8 7 2 5
4 3 2
7 1
1 2 8 3
Hard #8
2 7 6
8 6 2
9 4 5 2
4 3 8
1 8 4 3 7
5
2 6
7 3 1 5 8
4 3 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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