Printable Hard Sudoku

Set u1gxjg. 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 9 7
5 4 2
7 9
8 7 4 5
8 1 3
4 6 3 9 1
2
9 4 5
1 4 3 2
Hard #2
1 7 4 8 6
2 6 9
6 1 5
4 6 7 1
8 2 3
5 9
6 4 8
8 9
3 8 5 1
Hard #3
1 9 4 3 7
2 4
3 9 2 1
8 5
5 7 6 9
9 5 8
5 2 6 1
8 2
4 1 2
Hard #4
5 2 4
7 6 2 5 9
3 8 4
6 3 2
8 9 7 3 5
9 7 1 2
8 6 4
8 1 9
Hard #5
5 4 3
6 8 3 7 2
8 1 6
3 9 2 5 4
7 6
4 1 9
3 6
9 2
1 7 4 5
Hard #6
4 1 3
1 2 8 5
8 7 3 9
9 5
1 6 2
3 1 9
9 7
2 8 5 4 1
6 7 4
Hard #7
6 9 4 7
1 2 4 9
4 8 3 5
3 6
9 6 8
7 2 1 5
2 1 8 3
6 2
6 9
Hard #8
8 6
7 8 5 3
4 9 5
6 7 4
5 1 8
2 3
1 2 6
8 9 2 3
3 7 6 4 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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