Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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