Printable Hard Sudoku

Set hyag1w. 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
9 8 1
3 4 2 5
7 5 2 3
1
8 2 5
1 5 8 6 9
2 3 7
6 9 4 2
9 7
Hard #2
3 9 5
9 2
1 8 4 5 9
6 2 8
9 7
9 6 3 7 1
4 2
3 5 4
1 9 6 7
Hard #3
8 9 6
7 1 2
9 4 6
1 8 9 3
8 7 4
1 4 7
2 5 6 9
3 2 5 7
5 4
Hard #4
6 7 1 8 5 3
8 3 6
1 5 3 2 8
8 9
1 4
9 3
8 3 1
7 1 5
5 6 2
Hard #5
6 5 4 9 7
9 4 2
2 8 5
8 7 1 5
9
3 5
1 9 6
2 4 8 6
4 1 2 8
Hard #6
7 6 1 2
3
9 7 3
8 2 3
7 6 5 8 4
9 2 1
5 4 1 7
6
2 7 8 4 6
Hard #7
1 8 3 2
2 8 4
6
4 1 3 7
7 4 9 2
5 8 1
4 1 8 6 2
5 8 4 3
9
Hard #8
9 2 6 5
4 6 3 2
2 3
2 7 5
4 3 7 9
5 7 8
1 3
6 1 8
9 8 4 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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