Printable Hard Sudoku

Set cbrxl8. 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
2 4 7 9 5
3 5 1 2
1 2 3
5 8 6
8 1
3 8 2 4 9
4 6 1
9 2 8 5
Hard #2
4 5 6 1
8 7
7 1
1 2 7 6 3
5 8 7 4
9 8
1 9 7
6 5 3
5 3 6 4
Hard #3
1 5 7 6
5 4 9 2
7 5
2 3 9
7 5
9 3 2 8
6 5 4 3
2 8 5 4
4 8
Hard #4
3 6 1 5
4 5 8 6 7
1 3 5
8 2 9 6 3
6 5 7 4
3 1
5 4
9 2 3 5
Hard #5
9 5
4 1
6 4 5 8 3
9 8 5
3 8 1
2 7 5 8
2 3 8 5 7 6
3
1 3 4
Hard #6
4 6 5
3
5 8 6
9 5 4 2
5 8 1
8 1 2 4 9 5
7
6 2 4 7 8
5 1 2
Hard #7
3 4 8
5 1
2 5 3 6
5 7 1
1 9 4 8 3 6
7 5 2
4 8 7 2
7 2 6 4
Hard #8
2 6
1 3 2
5 3 4
3 9 1 2
6 2 4 8 3
3 1 5
8 7 6
5 8 3 9
9 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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