Printable Hard Sudoku

Set bg27bs. 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
6 9 7
6 8 3
2 3 5 8
2 1 8 6 3
7 9 4
8 6 5 9
1 8 4 5
4 3
9
Hard #2
4 9 5 3
7 2 8
6 5
7 5 9 8 3
3 7 6 1
1 9 6
4 2 8
9 8 4
3 1
Hard #3
1 5
5 2 4 1
1 6 2 5 9
7 6 8
6 8 5 2
3 5
8 2
2 8 6
9 1 7 4
Hard #4
9 7 2 8
1 9 3 5 6
8 4 3
3
3 7 4
6 5 9 1
6 8 2
7 2 1
4 8 9
Hard #5
1 9
8 3 2 7 1
6 7 4
1 7 8
2 6 8 4 5
4 1
2 7
7 9 4 3 2 8
8
Hard #6
7 2 6 5
6 5
1 9 6 4
9 8 7 6
1
4 8 7
9 4 7
4 7 2
5 8 6 2 1
Hard #7
7 4 1
2 4 6 9
5 9 3
2 4
2 4 5
4 1 6 2
3 7 4 1 6
8 7 4 1 3
Hard #8
1 4 3 5
5 8 2
2 1 9
7 3 6 4
9 4 5 7
5 4 2
8
1 6 7
6 2 3 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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