Wikipedia
Atsumari
Atsumari (; translates as "collection", "meeting", or "cluster") is a binary-determination puzzle that was originally developed by Quadratic Games for the iPhone platform. The puzzle is played on a hexagonal grid. A rectangular board shape is standard but variations to the board shape can be part of the puzzle design. The puzzle starts with a subset of the hexagonal cells containing a number greater than or equal to zero. The solution to the puzzle is a unique pattern of black/white hexagonal cells that does not violate any of the puzzle rules.