Printable Hard Sudoku

Set y3eexs. 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 2
8 3 7 9
7 4
5 4 2
6 8 1 5
6 8 1 3
7 8 2 4 6
3 8
5 6 7
Hard #2
1 8 4 2
7 1 5 9
3 5 9 2
4 7 8
1 6 7
9 5 4
9 6
6 1 2 5
6 4
Hard #3
1 3
3 6 2 7
2 4 6
2 7 5 1 4
9 3 5
5 7 1
4 2 3 9
2 9 7 4 1
Hard #4
2 7 1 4 5 3
6
5 6 3 9
6
5 1 3 4 2
2 9
4 8
9 8 2
3 7 5 6 1
Hard #5
7 5
9 1 8 4
4 5 8
5
2 6 4 9
3 8 2
9 4 2 3 1
9 4 6
7 6 4 3
Hard #6
3 7 1 6
6 5
2 6 7 4 9
4 7 3
9 8 6
6 2 7
9 7
1 8 5
4 3 8 2
Hard #7
1 4
5 2
2 7 9 6 3
5 9
9 3 4 7 8
8 7 5
4 6 2
6 4 9 3 1
1 2
Hard #8
1 9 4
6 3 9
9 7 2 4 8
1 9 7
8 1 2
6 2 8 3 4
3 6 5 8
6 3
7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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