Psycho Killer/en

Instructions

Fill the grid with digits 1-n so that each digit appears exactly once in every row and column. The puzzle is a Killer Sudoku puzzle with missing regions. Determine the regions and solve the puzzle. Each region contains its sum in the cell which is the first left cell of the topmost cells. There is no region that contains only one digit. No digit can be repeated within a sum.

History

Variant developed by Mehmet Murat Sevim (Turkey).