Changes

two or more pawns on adjacent [[Files|files]] - as [[Duo Trio Quart (Bitboards)|duo]] or phalanxon the same [[Ranks|rank]], mutually protecting their [[Stop Square|stop squares]], - or either as [[Defended Pawns (Bitboards)#Defenders|defending]] or [[Defended Pawns (Bitboards)|defended]] member of a [[Pawn Chain|pawn chain]].[[Stockfish]] gives a connected pawn bonus based on the [[Ranks|rank]] of the phalanx or defending pawn <ref>[https://github.com/official-stockfish/Stockfish/blob/master/src/pawns.cpp Stockfish/pawns.cpp at master · official-stockfish/Stockfish · GitHub]</ref>.