Printable Hard Sudoku

Set 162rp2c. 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 8 3
5 8 2
2 7 6
5
5 3 9 6
8 4 2 9 5
7 8 1 4 3
6 2
1 4 3
Hard #2
2 8 6 9 4 5
8 3 5 2
4 3
9 6 7
2 6 5
1 7 2
6 1 3
2 8
8 4 1
Hard #3
4 8
5 8 1 9 7 3
9 6
5 4
7 3 8 9 2
9 4 1
5
1 6 7 2
6 2 1 9
Hard #4
3 8 5
2 5 9 6
4 7 5
9 2 3
4 1
9 7 8 1 5
7 8 2 4 6
9
4 5 2
Hard #5
4 1 2 8
5 2 8
7 3 4
6
6 7 1 2 4
8 9 1
4 6 7 1
3 2 6
5 1 9
Hard #6
1 6
9 7 2 3
4 2
3 2 5 4 9
9 5 4
3 6 1
7 3 4 6
8 5 7 1
9 5
Hard #7
7 5
6 8 4
1 9 8
8 3 6 9 4
9 1 6 2
5
9 6 4 8 7
5 7 3 4 6
1
Hard #8
2 6 3
7 1 8 4
1 8 9
4 6 2
1 3 7
6 9 5 8
1 4 2
7 3 8 9
9 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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