Printable Hard Sudoku

Set tp1nd3. 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
8 9 5 4 2
2 6
7 3
7 1 4 5 8
5 8 2 4 1
6 8 9
6 2 3
5
4 1 6
Hard #2
7 5
1 4 8
2 6 1
8 5 9 7
5 1 3 7 9 4
8 1
3 4 9
2 6 7 9
5 8
Hard #3
7 5 2
4 8 1 5
1 8 4 9
9 6 5 1 7
5
3 4
8 6 1
2 8
8 1 3 7 9
Hard #4
3 5
6 1 3 4 9
4 2 5 7
4 5 1
9 4 8
2 8
5 6 9
2 6 4 7 5
8 7
Hard #5
3 2 6
4 9 3 7
8 9 7 1
3 7 6 1
7 4 8 5 2
1 4
2 9
5 6 1 9
5
Hard #6
5 8 6
6 7 5 1 2 4
2 7 3
1 9 6
8 4
3 5 9 8
5 8 9 1
6 3
1 7
Hard #7
8 3 1 6
8
9 1 5 4
3 4 2 6
3 7 1 5
5 9 6 7
6 5 3
9
7 8 2 1
Hard #8
7 2 4
9 4
2 1 9 7
1 3 5 6 2
7 3 8 4
6 4
2 9 6
3 1
7 5 4 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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