Printable Hard Sudoku

Set b2q9yl. 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 6 1
1 7 9 8
6 7 3 1
9 5 3
7 2 4
4 9 7
8 6 5 2
9 1
9 7 5
Hard #2
9 4 8
5 6 1
3 1 4
4
1 7 4 2 5 6
2 9 8 3
2 3 1 9
7 6
6 5 2
Hard #3
2 3 5 9
9 8 4
5 7
6 3 1
9 5 4 6
1 5 8 6 2 7
6
3 9 1
4 2 1
Hard #4
2 4
7 6 8 1
9 7 8
9 6 5 4
7 2 9
4 8 6
7 9 5
7 5 1 2
8 5 1
Hard #5
8 3 2 5
5 4
4 3 1 7 6 9 8
4 9 2 6
3 7
1
7 9 5 8 2
6
6 4 9
Hard #6
5 2
4 2 3 1
9 6 4 5
1 9 6 7 3 2
1 3
8 6 5
4 7
4 9
8 3 6 4
Hard #7
9 7 5
3 4 7 8
5 6 2
3 2 6 9
1 3 4
8 1 4
9 1 8
4 1 2 9 7
1
Hard #8
8
5 8 1 2
7 5 3
7 1 6 8 5
5 8 1 6 4
2 5 7
2 1 6 4
3 9 1
4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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