noun
superko; superko rule
A Go rule that prevents repetition of a previous board position, covering situations like triple ko and eternal life. Technical term used in Go.
スーパー劫ルールは、三劫や長生などの循環形を禁止する。
The superko rule prohibits cyclic patterns such as triple ko and eternal life.
この対局ではスーパー劫が適用される。
Superko is applied in this game.
超コウ is another term for superko, sometimes used interchangeably.
From English 'super' + 劫 (こう, 'ko'), a Go term. The exact origin is uncertain, but it is a modern technical coinage.