DWG-102.2.11
Killer Sudoku #11 · Medium
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About this puzzle
Sheet #11 divides the grid into 27 cages averaging 3 cells. No cage has just one possible set of digits, so the first footholds come from the rule of 45 and from the places where cages meet.
The largest cage covers 5 cells and adds up to 27; it starts at row 1, column 1.
The most open cage, 25 in 5 cells, still allows 12 different sets of digits — leave it for later.
Where to start
At least once you will need the rule of 45: total a row, column or box and subtract the cages that lie inside it.