Printable Hard Sudoku

Set 2e7waz. 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
4 9 1
9 3 5 4
1 2 3
4 8 1 7
3 9 2 8
1 7 5 2 9
2 4
3 8 2 5
Hard #2
8 9 3
4 7 5 2
2 3 6 4
1 3
9 5
3 5 8 4 9
2 7 4
6 8
3 7 8 2
Hard #3
1 4 2 8
8 9
8 3 2 9 4 1
9 3 4
6 7 3
8 9
4 1 5 6
3 5 8 4 1
Hard #4
1 4 3
5 8 2 9 1 3
1 3 2 7 6
7
8 4 1
5 7 1 2
2 9
4 6 3 7
5
Hard #5
8 1 5 6
1 4
4 5 1
5
4 6 7
4 9 6 2 8
2 7 6
6 1 4 5
7 8 3 1
Hard #6
1 8 9 2
5 2
7 8
4 3 7 6
6 2 7 4 9
9 6 1
6 3 5 4
5 1 7
3 9
Hard #7
4 2
3 8 2
7 6 3 5
1 3 8
5 7
6 1 5 4 9
8 2 4 6
7 8 3
7 9 4
Hard #8
8 5 1
5 2
4 1 8 2 5
8 5 4 3
3 4 2
9 7 6
9 3 8 7
1 3
6 3 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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