Printable Hard Sudoku

Set wcqh83. 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
4 5 8 7 1
3 4
6
7 8 3 5
3 7
8 1 7 9 3
9 6 4 1
3 7 1 9
4 8
Hard #2
5 7 9
8 1 6 2
3 4 6 1
4
9 8 5 3
9 2
5 4 2 6 1 8
2 8 4 7
9
Hard #3
1 3 4 6 8 2
6 2
4
4 5 7
3 2 7 5 1
2 9 8
9 5
3 1 8 7
8 7 4
Hard #4
3 9 8
4 1 3 5
4 7 3 8
1 6
8 9 1
7 9
2 8
4 5 8 7
6 1 5 2 4
Hard #5
8 9 6 1
6 3 5 8
4 8 7
1 3
7 4 5
3 6 8
3 7 2 4 6
7 9
1 4 9
Hard #6
4 5 6
6 8 4
8 9 4 3
8 9
7 5 4
2 3 6
3 7 9 6
2 5 1
6 3 2 5
Hard #7
3 6
6 7 8
2 9 4
3 2 9 5
2 3 9
4 8 1 6 2
5 2 7
7 3 5
8 7 6
Hard #8
5 9 2 4
3 1
4 2 9
5 1 2 3
1 7 4
4 9 3 8
3 1 7 9
4 6 8
8 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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