DWG-102.2.12
Killer Sudoku #12 · Medium
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About this puzzle
Sheet #12 divides the grid into 28 cages averaging 2.9 cells. One cage has only one possible set of digits — the natural place to begin.
The largest cage covers 5 cells and adds up to 23; it starts at row 3, column 7.
The most open cage, 18 in 4 cells, still allows 11 different sets of digits — leave it for later.
Where to start
The 16 in 2 cells starting at row 8, column 3 can only be 7 + 9.
At least once you will need the rule of 45: total a row, column or box and subtract the cages that lie inside it.