EntityQ162109· pop 5· linked from 13 articlesSimSign in to savepencil gameConnectionsdigital object identifierEntityInternational Standard Serial NumberEntityJSTOREntityQ118398EntityThe SimsEntitycomplete graphEntitycomputational complexity theoryEntitynodeEntitymonochromeEntityRamsey theoryEntityRamsey's theoremEntitypaper-and-pencil gameEntityglossary of graph theory termsEntitytheorem on friends and strangersEntityGustavus SimmonsEntityCatrobatEntityCategoriesCombinatorial game theoryCombinatoricsMathematical gamesPaper-and-pencil gamesPositional gamesRamsey theorySolved games