Killer Sudoku 1 — Hard
9×9 · 32 cages · no starting numbers
18
11
20
17
18
12
12
10
28
2
18
7
6
15
8
15
27
17
3
11
17
2
6
10
19
8
10
6
28
13
8
3
Mistakes 0/3 Time 0:00
This free printable hard killer sudoku has one unique solution. The grid starts empty, use the cage sums (the small numbers) plus the normal sudoku rules to work it out. Play online, or hit Download PDF for a clean copy with the solution on page two.