This is a round-specific thread created to allow restricted discussions between participants who have completed the round.

For general discussions, it is recommended to continue using the 5 main discussion threads stuck to the top here - https://logicmastersindia.com/forum/forums/forum-view.asp?fid=62

I'm just staring at Equal Sum Killer Sudoku. I know the sum can either be 15, 17, or 18 but don't know where to go from there...