breakthrough Key Squares 1 Key Squares 2 Races 1 The Rule of the Square Rook Pawn Shouldering Geometry & Reti Races 2 Zugzwang Rook: Mate Rook: Open file Rook: Pawn structure Rook: Behind pawn Rook: In front of pawn Rook: Seventh rank Rook: Stalemate Rook:The king Rook: Vulnerability Roo...