Rules that use this fact are called territory rules. A further simple scoring method exists. Primitive rules even completely avoid scoring. Primitive Rules Instead of determining the winner by scoring primitive rules let the first player without an available move lose the game. Such rules omit passes.
Games tend to be very long and are so called pass fights.
Their final stage consists of suicides respectively attempts to prohibit those of the opponent. They are important in mathematics. The simplest scoring method considers coloured grid points only. Both players fill as many grid points as they can. Only single eye points or small shared spaces remain.