Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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