pawn: doubled
Two pawns of the same side on the same file They are not easy to move and cannot easily be both protected, so, one or both may be a weakness (Fischer-Petrosian, Debbage-Lane, Matison-Nimzowitsch, Jepps-Regis) However, if the capturing pawn moves towards the centre, as it should, there maybe compensating advantages of central control, a half-open…
