= fighting stone play
Suppose Black starts by occupying the left intersection at .
= fighting stone play
White responds by , occupying the right intersection which captures the black stone.
= primary pass play
Black 3 cannot occupy the left intersection immediately, because it would be classified as a fighting stone play and it repeats the board position encountered by White before White played . Within this cycle, Black has only one play as a fighting stone play, so such play is prohibited by Fighting Situational Super Ko (FSSK). Black 3 can thus only be a pass play.
= primary pass play
White is satisfied with the current board position, so White 4 is a pass play.
= reviving stone play
now recaptures the right white stone. Like a stone play in Black 3, it also repeats the board position encountered by White before White played
, but since
is played after two consecutive pass plays, it is classified as a reviving stone play rather than fighting stone play. Within this cycle, Black has two plays - one is a primary pass play (Black 3) and one is a reviving stone play (
), so there is no prohibition.
= primary pass play
Similar to Black 3, White 6 cannot occupy the right intersection immediately, so it can only be a pass play.
= primary pass play
Black is satisfied with the current board position, so Black 7 is a pass play.
= reviving stone play
now recaptures the left black stone. Similar to
, it is classified as a reviving stone play and there is no prohibition.
= primary pass play (mandatory)
However, Black 9 does not have any legal play. If he occupies the left intersection and captures the right white stone immediately, it would repeat the board position encountered by White before White played and become a fighting stone play, which results in FSSK. If he passes, it repeats the board position encountered by White before White made his pass play in White 4. Within this cycle, the first Black play was
and it was a reviving stone play, and thus Reviving Situational Super Ko (RSSK) would be triggered.
Under Mandatory Pass Rule, Black 9 is a mandatory pass play, and Black can no longer make any stone play in the rest of the game.
= primary pass play
White is satisfied with the current board position, so White 10 is a pass play.
= secondary pass play (mandatory)
Black is not but he has no choice, so Black 11 is a pass play.
= secondary pass play
Again, White is satisfied with the current board position, so White 12 is a pass play.
Under End of Game Rule, with consecutive secondary pass plays by all players, the game ends with this board position. White wins 2 points under area scoring and territory scoring, or 1 point under stone scoring.
Therefore Black 1 should pass in the first place.
= disturbing stone play
If suicide is allowed, Black 7 can choose not to pass as it can fill up the right intersection to commit suicide instead.
= fighting stone play
However, it does not alter the outcome because White 8 would then occupy the right intersection. It is here classified as fighting stone play rather than reviving stone play because was here a stone play.
= primary pass play (mandatory)
= primary pass play
= secondary pass play (mandatory)
= secondary pass play
Black 9 still does not have any legal play. In this case, White wins 2 points under area scoring or 1 point under stone scoring, but 3 points under territory scoring.