Printable Hard Sudoku

Set 1bk8scf. 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
3 2 4 5
6 5 9 3 8
8 4 6 9
4 6 1 7
4
3 5
9 1
2 7 3 6
1 4 6
Hard #2
5 6 1
5 9 2
8 1 6 9
3 9
9 1 5 7
1 6
4 2 7 3
7 9 8
8 3 6 7
Hard #3
1 7 4
4 6 2 7 8
9 6
3 2 5 7
1 6 9
2 3 9 5
4 1 7
8 6
2 9 8
Hard #4
8
1 7 9 2 8
3 4 5
9 8 3 5 1
2 9 1 3
8 2
6 2 7 5
1 5 9
7 3
Hard #5
4 9
3 8 6
7 9 6 2
5 8
8 5 7 4
4 9
4 7 2 6
2 5 3 4
6 8 1 7
Hard #6
6 2 5 8 3
9 6
2 3
7 3 1 2
1 3 5 9
4 6
9 4 2 8 3
5 7
3 8 7
Hard #7
3 8 4
1 4 5
2 9 7
3 4 2
9 8 6 3 5
8 7 4
9 8 3
6 8
8 9 3 5
Hard #8
9 1 4
1 8 5 2 6
2 5
8 2 7 3 6
5 7 2
4 1
9 4
4 3 2 7 5
1 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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