Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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