
STACK  One, two or four (not
three) stones of the same color on the same cell. 

CORNERS  Each
connected set of marked cells.

Corner is controlled by a player, if
that player has stacks on all its marked cells. 


SETUP  Each player
puts a stone in an empty cell. 

TURN  On each
turn, each player must do one of the following actions:

Move a stack to any (orthogonal or
diagonal) adjacent space 

Divide to an (orthogonal or
diagonal) adjacent cell

A stack of size 2 divides into 2
stacks of size 1. 

A stack of size 4 divides into 2
stacks of size 2. 


Grow.

A stack of size 1 grows to size
2. 

A stack of size 2 grows to size
4. 

A stack of size 4 cannot grow. 



LIBERTIES  One liberty
is one empty orthogonal adjacent cell.

A stack with no liberties is removed
from board. 

A stack of size 1 requires two
liberties to grow into a stack of size 2. 

A stack of size 2 requires two
liberties to divide or move, and three liberties to grow into a
stack of size 4. 

A stack of size 4 requires 3
liberties to divide or move. 

Pieces cannot commit suicide, but
they may make a move which is only legal after any captures have
been dealt with. 


GOAL  Wins the player
that controls 3 of the 4 corners. 