Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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