superko; superko rule
A go rule that prohibits repeating any previous board position, used to resolve situations like triple ko or eternal life that would otherwise lead to infinite loops.
Superko is one of the rules of go that prohibits the repetition of any previous board position.
When a triple ko occurs, the superko rule may be applied to determine the outcome.
Standard spelling in go terminology, using katakana コウ for the ko rule.
Alternate kanji spelling using 劫 for ko; less common than 超コウ.
Compound of 超 (chō, 'super-') and コウ (kō, 'ko'), a go term referring to the rule against repeating board positions. The reading ちょうこう follows standard on'yomi.