Printable Hard Sudoku

Set h29xcv. 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
4 1 6
5
3 9 7 5
9 7 4 5 1
2 6 9 3
6 5 2 9
3
7 1 8 3 6
3 4
Hard #2
2 9 7
6 1 3 8
9 8 3
1
8 3 4 7
7 3 2 5
1 9 6
5 1
9 6 1 5 4
Hard #3
5 1 4 8 6
2 9 5 8
6 4 1
8 1 3
1 2
9 6 3 7
1 9 7
8 2
7 3 5
Hard #4
2 8 1
8 7 3
5 2 8 9
2 1 4
5 9 7
3 4
1 3 9 6
3 4 9
7 5 6 3
Hard #5
1 2 6 7 4
8 1 9
4 5
1 8 7 4
8 5 3
9 4 3 7
7 6
3
5 1 4 7 9
Hard #6
9 6 7 8 5 2
4 3 7
5 1 6
6 7
6 2 3
9 2 1 4
6 1 8
3 9
2 8 9
Hard #7
7 3 1
6 2 7
3 8 9 4 5 2
5 1 2 7 6 4
3 5
4
6 4 1
9 6
2 7 8
Hard #8
3 9 6
2 1 7 9
8 3
4 8 7
5 2 6
1 9 3 4 5
9 3
7 2 6 5
9 7 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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