Printable Hard Sudoku

Set 9jwt2l. 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
2 1 4
7 9 1 2 3
1 7 8 6
6 9
7 5 6 3
2 3 8
1 4 2 8
8 3 5
5
Hard #2
9 3
7 1 8 5 4
8 5
4 1 5
5 8 2 7
6 3
5
9 3 2 8 7 5 4
6 9 8
Hard #3
3 7
4 7 5
1 3
7 5 2 9
6 4 5
5 1 2 6
6 9 2
8 9 1 3
9 2 3 1
Hard #4
7 2 4 6
4 9 8 5
6 9 2 1 3
8 3 9 4
4 3 2
9 8 1 3
7 4 5
5 9
Hard #5
8 7
7 3 6
1 2 8 6
2 5
9 6 2
8 4 6 5 3
5 4 1
3 5
7 4 9 1 2
Hard #6
9 6
9 1 3 7
5 8 3 6 7 4 1
1 5
2 5
1 8 2
9 8
9 4 2 7
2 3 5
Hard #7
8 4
7 2 8 6 9
4 9
5 4 3
1 2 6 7
9 7 3
3 9 7 4 8
7
4 2 5 6
Hard #8
7 5 2
4 2 9 3
3 7
2 5 3 1
7 1 4
6 8 4 2
2
8 6 5
1 4 6 5 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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