Printable Hard Sudoku

Set l58vbj. 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
5 6 3
4 5 9 7
8 1 4
6 8
8 2 7 5 1
2
5 6 2 1
2 8 3
9 1 7 2
Hard #2
4 1 5
3 7 4 6
6
5 8 7 3
2 4
7 6 2
8 6 1 9 3
5 9 8 6
7 8 2
Hard #3
7 9 8
8 2 1 6 3
5 1 4 2
4 7 9
1 9 2 8
6 3 5 1
3
6 1
9 4 8
Hard #4
5 1
4 2 3 5 7
8 9 6
6 3 9 7 8
4 6 8
7 3 9 1
6 8
1 2 4 9
6
Hard #5
2 1
3 4 9 7
8 5 1
9 7 8 1
6 2 5 3
4 5
7 4 6
3 2 1
3 1 7 2
Hard #6
9 7 5
3 2
2 3 1 7 9
9 4 2 3
5 6 9 8
3 7 4 1
5 8 9 3
8 5 2
Hard #7
4 9
1
3 4 2 1 5
2 8 7 6
6
7 5 4 9 3 2 1
2 9
9 6 4
1 6 9 8
Hard #8
6 1 3 7 8
2 7 8 9
4
5
6 5 3 9
1 4 8
9 5 3 6
1 8 7 3
8 1 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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