Printable Hard Sudoku

Set 1txdf82. 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 7 2
1 5 9 7
2 6 5
7 3 2
4 1 7
9 8 4 1
2 8 9 3
6
9 2 7 4
Hard #2
2 6 5 1 8
5 3 7
8 2
1 5 8
3 4 7
2 4 1
5 6 2
2 7 6 9 1
1 9
Hard #3
5 2
9 7 6 8
1 7
7 4
6 4 5 1
8 1 6 7
8 1 3
9 8 7 2 6
4 9 8
Hard #4
8 2 6 9
6 9 3
3 7 2 1
1 9 8
5 2 1
4 6 1 5
5 3
9 2 6
2 4 7
Hard #5
4 6
8 2 1 9
9 3 4
5 3 4 8
3 2
9 6 5 4
6 1 9 5
1 6 7 8
7 3
Hard #6
3 7 8
3 2 4 9 6
5 4 2 1
4 8 1 7
3 2 4
7 9
5 1 9
4 3 8
2 6
Hard #7
5 6 9
4 3
6 1 7 2
2 9 3 8
8 7 2 6
9 6 1 5
4 8 2
4 1
9 1 7
Hard #8
5 6
6 2
2 7 8 3 1 6
5 1
3 8 4 6
4 9 8
8 6 9
7 9 8
9 7 2 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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