Printable Hard Sudoku

Set 15j0rez. 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 7
1 8 9 3
4 9 6
6 8 3 7
2
9 7 1 3 6 8
3 7 6
1 2 5
8 4 9
Hard #2
5 4 2 8
8 2
5 7
8 9 6 1 2
6 5 7 8 9
3 7 9 4
2 3 7
1 4 6 3
Hard #3
6 4
2 6 1 7
7 5 6
4 5 3 2 6
1 8 5 2
2 5 6
5 4 6 3
1 9 2
1
Hard #4
5 8 4 9
3 6 5
6
7 2 4
9 1 4 2 8 6
2 6 8 3
5 7
8 2 7
3 8 1
Hard #5
6 7 8 1
8 5
1 9 8
6 2 1
5 7
9 2 1 3 5
4 2 5
8 1
6 7 9 2 3
Hard #6
7 3 6
3 7 8 9
4 9 2
3 8 7 1
8 6 5 3
5 6
6 4 2 8
3 6
1 3 4
Hard #7
6
6 5 3
2 8 7 1 3 5
8 2
4 8
7 5 8 3 1
8 1 4 6
2 5 7
3 2 7
Hard #8
4
3 2 9 7
7 9 6 4 3
9 5 3 2 8
2 3 7 4
6 4 1 9
9 5
1 7 3 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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