DWG-102.2.07
Killer Sudoku #7 · Medium
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About this puzzle
Sheet #7 divides the grid into 28 cages averaging 2.9 cells. 3 cages have only one possible set of digits — the natural place to begin.
The largest cage covers 5 cells and adds up to 30; it starts at row 7, column 9.
The most open cage, 19 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 2, column 2 can only be 7 + 9.
The 17 in 2 cells starting at row 7, column 1 can only be 8 + 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.