Printable Hard Sudoku

Set g5cwhg. 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 6 1 2
6
7 3 6 4
9 1 4
3 9
4 5 6
6 8 4 9 1
3 7
7 4 6 8 2
Hard #2
4 6 1
4 3 9
8 6
9 2
6 1 2 8
9 8 3
4 8 3 7 1
3 8 5
1 7 3 6
Hard #3
5 7 9
8 5
9 6
1 3 6
5 2
7 3 9 8 5
6 2 8
7 6 5 3
9 8 1 2 4
Hard #4
2 6
7 9 8 3
5 7 1
8 4 9 7 3
4 8
2 5 1 9 4
8 6 4
4 8 1
4 2
Hard #5
8 9 6 4
7 9 5
3 1 6
3 7 5 8
1 6 4
4 3 5 7
7 9 8
2 4 8
3 6
Hard #6
9
9 5 6 4 7 2
1 6 3
4 2 9 1
6 8 7 5
3
8 2 6 5 1
1 7 8
8 1
Hard #7
3 2 4
1 4 6
8 4 1 3
6 8 5 4
7 2
9 7 8
4 2 5 7 6
8 9 1
7 6
Hard #8
7 1 8
2 5 3
5 4
7 8 3 4
2 3 9
3 9 8
4 3 6 9
1 6 4
2 4 5 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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