Printable Hard Sudoku

Set 13qe5c5. 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
1 7 6 3
6 3 7 9
5 8
7 3
4 8 1 6
8 3 5
6 9 5 8 1
7 3 5 6
4
Hard #2
7
2 4
1 2 6 3
7 2
3 7 8 9 4
4 1 2
2 4 1 3 8 6
3 4 5
5 6 7
Hard #3
9 3 7 5
2 3
1 8 6
2 7 9
1 3 4 2 5
7 1
9 7 8
3 5 4
5 6 1 3
Hard #4
6 7 4
9 4 8 3 7
8 2 6 4
2 5 9
3 8 7 2
7 4 6
2 6
9 5
7 6 8
Hard #5
6 2
7 1 6 3
1 3
6 9 7 2 5
4 2 7
1 3 9 4
6 8 1
8 2 1 3
9 2
Hard #6
8 9 6
9 1 4
1 5 4 6
5 3 4 6 9
7 8
6 9 5 4
2 3 5
7
7 8 6 4
Hard #7
9 6
6 4 2 9
4 3 8 2 9
6 5 1
9 8 4 7
5 1 2 9 6
3 8
3 1 9 5
Hard #8
2 3 4
3 2 8 5
5 3 4 7 2
6 4
4
1 3 7
8 1 6 5
9 7 1 5 3
5 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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