🌐EnglishEnglishEspañolFrançais中文日本語EntityQ747298· pop 5· linked from 12 articleszero gamegame where both players can't moveAvailable in 5 languagesEspañolFrançaisEsperantoLatinvia Wikidata sitelinks · CC0ConnectionsSprague–Grundy theoremEntityJohn Horton ConwayEntityCategories0 (number)Combinatorial game theory