Printable Hard Sudoku

Set g6te5k. 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
9 2 4 7
4 2
1 6 9
1 5 3 9 8 2
8
7 6 9 1
1 8 5
5 6 3
8 2 4
Hard #2
3 7 8 1 6 2
1
9 4 3 1
5 2
6 1 7 8
6 8 5 3
8
2 7 8
1 9 8 2
Hard #3
5 1 7
6 3 9 1
2 4 9 6
2 5
3 1 4
8 4 1
1 7 6
8 4 5 1
6 1 9
Hard #4
2 1 4 6 8
7
6 8 2 7
8 6 2 9 5
4 3 2
5 7
7 3 1 4
5 1 6
3 6
Hard #5
9 5 8 2
6 7 4
3 7
3 5 1
9 1 5 8
3 4 6
5 4 2 6
8 2
6 1 4 7
Hard #6
8 9
6 8 7 3 5
1 3
6 4
5 4 1 2 9 6
3 9
5 3 1
2 9
4 1 8 7 6
Hard #7
5 2 9
7 1 3
2 1 8 5
8 9 5
6 5 8
4 2 6
8 7 2 1
3 2 5 9
6 2
Hard #8
4 2
1 4 2
9 7 3 6
1 8
6 1 2 4
3 7 8 2
6 2 8 7 1
8 3 4 9
4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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