Printable Hard Sudoku

Set 1xjx4ru. 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
1 2 5 8 4
7 8 3
9 1
2 3
8 7 2
6 3 5 4
4 7 1
6 1 8 9 7
6 7
Hard #2
9 8 4 3 2
2 5
3 9 4
4 5 9
3 9 6 7
8 6 4
9 2 5
4 3 6 1
6 9
Hard #3
9 8
2 6 9 3
2
3 1 6 2 8
1 6 5 3 2
2 6
7 2 3 9 8
6 3
6 4 5
Hard #4
4 8 6 7 2
2 1 6 8
5 1 8 3
3 2 5 6
2 9
8 2 7
6 8
3 8 4
8 1
Hard #5
8 6 4 5 1
5 2 6 3 7
4 5 8
9 5 1 4 2
8 7
7 8 4 9 3
3 5 1
6
Hard #6
2 8 3 7 9
1 6 4 2
3
9 6 7 5
7 8
9 5 4 3
3 6 1
4 8 6
8 2 7
Hard #7
9 2
2 4
9 3 4 1 6
8 5 4
7 2
9 1
5 3 9 7
5 9 6 1 8
6 8 2 9
Hard #8
3 7
2 7 1 9
4 6 2
1 8
9 1 7
3 2 8 4
8 1 5
9 5 4 8 3
9 6 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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