Printable Hard Sudoku

Set 2p1g7r. 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
5 2 9 6 3
7 6
3 5 7 1
4 1
3 4 2
1 5 8 6 9
6 8 1 2 9
5
6 3
Hard #2
7 4 5
3 1 2 4 7
5 9 7
8 4 2 3
8 9 6
3 1
7 6 4
6 3 2
5 8 7
Hard #3
1 2 8 4 5
5 6 8 1
3 9 7
9 1 7
8 4
4 9 3
3 6
9 6 4 7 5
4 5
Hard #4
5 3 1 8
4 9 6 7
1 9 6 8 3
5 3
6 8 4
7 5 9
3 8 6
4 9 3
8 1
Hard #5
1 5 2 9
5 9 3 8 4
4 1
8 4 7 5 6
3
8
5 7
2 3 8
8 6 2 4 9 7
Hard #6
4 2
3 8 1
1 7 8
7 9 2 4 1
3 5 6
1 2
5 3
3 2 4
8 2 3 6 7 9
Hard #7
1
6 4 3 9
5 9 2 6 3
6 7 2
7 1 3
5 2 4
3 2 5
9 2 1 3 6
8 2
Hard #8
6 3 2
3 7
8 5 4 9
4
6 1 8 4 7
9 2 5 3
6 2 5
9 8 4 6 1
4 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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