Printable Hard Sudoku

Set 1fga6j7. 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 8 2
1 6 7
3 5
9 1 4
4 7 6 8
1 7 9 2
8 3
2 5 6
7 8 5 1 4
Hard #2
3 4
1 9
9 1 2 6
6 8 3
4 7 2
9 3 2 6 7
5 8
7 8 3 6
2 5 1 6
Hard #3
8 3
9 1
9 6 8 4
9 8 6 5
2 9
3 5 8 1
1 4 3 6 2
6 7 4
5 7 2
Hard #4
8 2 3
5 8 1 6
2 5
9 3 8 4 1
3 1 7
7 2 5 3
3
1 6 5 3 7
9 1
Hard #5
4 9 7 2 6 5
8 2
5 8 9
3 9 2
9 7 4 3
1 5 3 7
6 9 7
6 5 3
2
Hard #6
1 3 6
9 1
6 8 4
7 3 6 4 8
8 2 6
9 3 2
6 3 4 2
4 1
2 8 5 6
Hard #7
8 3
7 1 9
9 7 5 2 4
6 8 4 1
4 9 3
2 1
5 2 9
2 8 5 7
9 3 1
Hard #8
9 2 5
1 9 4
5 2 6 1
9 3 4 6
3 9 5 4
8 1 3
1 7 4 3 5
2 8 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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