The contents of the Workbook Step 5 plus: More or less new topics: King in the middle; queen ending; pin; bishop against pawn; zugzwang. Elaborating the already introduced material: * mini plan: Opening the position, piece to a better square; pawn ending: The rook's pawn, tempo play. defending. * wrong bishop: Winning and drawing positions. * vulnerability: Exploiting vulneribility. * defending: Defending against threats, a passed pawn, king's attack, a passed pawn.