Printable Hard Sudoku

Set 1bghf6g. 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
7 6 4 9
4 6 5 3
1 3 2
9
5 6 2 8
8 9 3 6
8 5 6
2 4 3
8 9 7
Hard #2
5 6 7 1
3 1
9 8 7 5 4
6 3 2
4 5 3 6
9 4
6 4 7
2 4 7 1 6
3
Hard #3
3 4 7 2
6 4 9
2 1 5 7
9 1 7
6 4 5 8
1 8 5 3
9 6
5 7
1 6 3
Hard #4
8 1
9 3 5 2
7 9 6 8 5
7 8 3 2
4 5 1 7
3 2
8 3
1 5 4 9
4 7
Hard #5
4 7 3
8 3 6 9
3 7 1 4
1 9 3
9 5
3 8 7 2
7 5 3 4
1 4 5 7
2
Hard #6
6 2 7 1
7 1 5 4 8
9 3 5
4 7 5
8 5 4 1
7 2
2 9
2 8
8 6 7 3
Hard #7
6 2 7 3 4
7 8 1
4 6 5
4 6
9 8 4 5 1
4 8 9 7
3 5 6
2 8 3 9
Hard #8
8 3 5
1 6 9 8
4 3
8 3 1 6
7 5 1 9
4 8 5
5
9 7 6 3
4 2 9 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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