Printable Hard Sudoku

Set uwz1jr. 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 1 6
2 4 5
3 9
6 9 8
2 7 8 6
5 4
6 5 7
3 4 5 6 2
9 2 8 5
Hard #2
6 8 2 3
4 6 9 5
1 9 2 8
3 5 4 7 1
8
9 3 7
7
2 3 4
4 1 7 8
Hard #3
5 3 1 4 2 9
2 5
7 6
8 9 6 2 4
7 5 6 8
2 3
2 8
9 3 4
2 9 3
Hard #4
6 8 4 7 5
8 6
2 1
8 2 9 5
4 5 1 6
1 3 8
9 2 1 3 7
7 3 8
9
Hard #5
4 8 2 3 9
6 4 2
2 5
3 7 5 2 9
1
2 5 9 1 3
7 2
6 1
1 8 7 4
Hard #6
1 2 7 9
3 9 5
7 8 5 6 3
6 5 1 7 3 9 8
1 5 2 3
2 7 6
3 4
8
Hard #7
9 1 2 5
4 1 9
8 9 7 4
8 2 3 4 5
3 6 2 5 7
4 7 2 8
2 5 1
9
Hard #8
1 2 5
2 4 6
9 5
8 4 7
5 4
4 3 7 8 5
8 1 9 3
3 7 2
9 8 5 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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