Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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