Printable Hard Sudoku

Set 10g22re. 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 6
2 9
4 7 6 2
7 2 5
3
1 5 6 8
7 9 3 2
5 3 8 7
2 9 5
Hard #2
3 4
3 1 9
4 9 6 2
4 7 2
6 1 7 5
5 8 1 7
7 6 8
9
1 6 7 3 2
Hard #3
7 4
6 2 9
5 7 9 2
1 8 3
8 5 2
3 7 2 4
2 6 3
9
9 4 1 3 7 5
Hard #4
8 7
1 9
9 6 5 3 2
8 2
5 2 3 4
2 7 6
3 5 8 1 7
6 9 2 3
1 8
Hard #5
9 5 3 8
9 1 3
2 7 6 1
1 6 5 8 4
8 9 7
3 6
4 2 7
7 8
5 8 6
Hard #6
4 3 5
7 2 3
3 6 1
8 2 1 7 4
1
6 3 7 2
5 4 6
9 6 5 8
8 9 2
Hard #7
1 3 2 4 6
3 6 8
7 6 4 8
5 2
2 8 5 4
2 4 9
4 5 8
9 4 2
9 3
Hard #8
1 2 4
2 6 1 9
7 3 5
6 5 9
5 6 4 3
8 1 4 7
3 8 7 1
2
4 6 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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