Printable Hard Sudoku

Set 1g6n9tc. 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
7 5
4 7 9
5 3 9 1
7 1 8 6 2
8 7
9 4 2 5
3 7
7 5 9 1
6 2 3
Hard #2
6 3
4 7 1
9 7 3 2 5
7
2 1 6
5 8 7
8 1 6 2
9 3
3 9 1 5 8 4
Hard #3
9 8 1
2 6
6 3 9 5
7 8 4
9 5 3
2 1 8
3 5 2 7
3 9 8
7 4 1 6
Hard #4
9 4 8 1
7 2
5 2 9 3
4 8 1 9
4 6
6 3 7
7 6 5 1 8
2 9 6
5 3
Hard #5
9 2 1
6 7
8 9
3 2 7 4
6
2 6 5 1
6 5 3 4 9
1 9 6 5 7
4 1 3
Hard #6
1 7 5
5 4
2 6 1 9 4
8 4 3 6
7 2
6 9 4 1 3
4 1 9 6 8
8 6
1
Hard #7
5 8
1 6 3 5
2 4 3 1
2 5
8 1 5
3 4 9
8 3 4
2 1 9 5
5 7 9 3
Hard #8
5
3 1 6
6 1 4 8
2 4 3 1 7
7 9 2 4
1 8 6
3 4 9
9 6 5 2
8 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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