Printable Hard Sudoku

Set 13pgjfj. 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
6 1 3 4
4 8 3 2 6
5 9 6 8
6 1 9
7 3
7 4 1
1 3 5 6 7
5 2
Hard #2
9 8 2
2 6 5 9 3
5 4 9 6 1
2 7 3 1
3 6 9
5
2 9 1
3 9
8 3 7
Hard #3
7 9 5
2 9 7 1 5
3 8
2 7
5 4 6 9
8 5
8 4 5 9 1
7 1 8 2 4
5
Hard #4
2 9 3 7
9 7 4
5 6
4 1
7 9 8 6
2 7 4 9 8 5
3 2 6 5
8 6 4
7
Hard #5
5 2
7 9 3
8 7 6 4
7 5 3
3 1 4 6
2 8 4
8 6
2 7 9 4
5 4 6 3
Hard #6
7 4 3 5 6
2 9 6 4
5 3 9
4 5 2
1 9 3
8
2 6
1 5 2
8 5 3 4 7
Hard #7
7 3 9
9
8 6 2 3 1
9 8 5 4
2 1 8
5 4 6 3
1 9
8 2 7 1
3 8 7
Hard #8
6 7 3 8
3 5
7 8
5 8 4 6
9 8 5 2
3 6 5 9 4
7 4
6 4 3 2 7
5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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