Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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