{{unreferenced, date=May 2019 Atsumari ( ja, 集まり; 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.

Rules

* Each cell containing a non-zero number is considered white and must be part of an edge-connected cluster of exactly that many white cells (including the numbered cell). The white clusters are enclosed by black cells or the edge of the board. Thus, a cell containing a '1' must be enclosed by black cells and/or the game board, a cell containing a '2' must have one edge-connected neighboring white cell, etc. White clusters cannot contain more than one number. * A cell containing the number '0' is considered black. * The black cells of the board (including the 0-cells) must form a single edge-connected cluster. * A black cell cannot be surrounded by black cells. This is equivalent to saying that the black 7-cell hexagon shape is not allowed.

Related puzzles

''Atsumari'' is similar to the puzzle

Nurikabe The ''nurikabe'' (塗り壁 or 塗壁) is a ''yōkai'', or spirit, from Japanese folklore. Its name translates to "plaster wall", and it is said to manifest as an invisible wall that impedes or misdirects travelers walking at night. Sometimes re ...

(based on a square grid) published by Nikoli. Logic puzzles Puzzle video games