noun
round robin ko
A go term for a ko fight that repeats in a cycle, where both players can recapture indefinitely unless a rule intervenes. Technical domain-specific usage.
See also: コウ
循環劫が発生すると、対局は長引くことがある。
When a round robin ko occurs, the game can drag on.
プロの棋譜で循環劫の珍しい例が見つかった。
A rare example of round robin ko was found in a professional game record.
コウ is the general term for 'ko' in go; 循環劫 specifically refers to a cyclic, repeating ko situation.
Compound of 循環 (cycle, circulation) and 劫 (ko, from the go term). The exact historical derivation is uncertain, but the term describes a ko fight that cycles.