1. A pawn at the base of a pawn chain that can't move forward due to one or more enemy pawns on the adjacent files.
2. A pawn which stands on an open file and cannot be protected by any other pawn.
1. A pawn at the base of a pawn chain that can't move forward due to one or more enemy pawns on the adjacent files.
2. A pawn which stands on an open file and cannot be protected by any other pawn.
English glossary of chess terms. Английский глоссарий шахматных терминов. 2012