Beschreibung
Medusa is a Go game played on a base-10 hexboard with 61 'holes', so that a corner cell has 2 liberties, a cell on the edge 3, and a cell on the inside 4, as in regular Go.

On each turn a player has the following options:

Drop a stone on an empty cell.
Move one or more of his groups (a group is a set of connected stones).
Drop a stone and then move one or more groups.
Pass.


The player with more points wins. Points awarded:

One point for each stone.
One point for each surrounded cell.