Rules
The board starts empty. Two players, White and Black, take turns placing a ball of their colour or a red ball either on an empty board hole or stacking on a 2×2 platform.
If a red ball is placed then the player must play another ball of their own colour in the same turn.
No single 2×2 platform may include more than 2 like-coloured balls:
Playing on a platform is only possible if the colour to be played is not used twice in the base:
Players must place a ball if possible. Only if there is no placement available (in the beginning of their turn or after a red ball was played) players must pass their turn.
The player who played the last ball wins the game. This can be a red ball and it need not be the spire ball on top.
Included in the Shibumi Rule Book
Soft cover:
http://www.lulu.com/shop/cameron-browne-and-nestor-romeral-andres/shibumi-rule-book/paperback/product-18940123.html
Downloadable PDF:
http://www.nestorgames.com/rulebooks/SHIBUMI_EN.pdf