Printable Hard Sudoku

Set 1ks44vj. 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
8 7 6
3 1 9
4 8 1 5
7 3 5
1 4 2
9 5 6 7
1
5 2 4
6 9 4 8 3
Hard #2
3
1 6 4
2 7 4 1 3
2 4 9 6
4 9 2 3 8 7
8 9
2 7 9
6 8 7
1 2
Hard #3
8 6 3 1
9 3 5 6
7
9 1 8
7
7 1 3 9
2 8 3
5 6 1 9
1 9 7 8 3
Hard #4
4 6 5
8 9 6 1 2
5
3 1 4 5
9 6 8
1 9 8
7 6
1 7 9 8 2
2 1 9
Hard #5
8 2 4 7
5 8
4 9 5
8 2 1 5
9 5 3 2
6
5 7 8 9
1 5
4 2 6 7 1
Hard #6
4 8 3 9
7 6 1 8
1 2 5
6 7 3 9 5
4 9 5 1
3 1
5 9
9 7 6
8 5
Hard #7
4 8 6
5 3 1 9
3 1 7
2 5 4
6 2
8 6
1 2 5 7 8
6 4 1
3 8 1 5
Hard #8
8 3 1
4 2 1
9
7 3 5 8 6
1 6 3 4
6 9 5
5 1 4 7 2
6 5 2 3 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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