Queenside attack

The queenside is the half of the board where the queen begins. Offensive play usually concentrates especially on the three outer vertical columns on that side, conventionally called the a-, b-, and c-files. If the opposing king used castling toward that sector, the special move involving the king and a rook, the aim may be to open its shelter and give mate. If the king is elsewhere, the attack may target weak pawns, create lines for rooks, or produce a passed pawn, meaning a pawn with no enemy pawn ahead of it on the same file or either adjacent file.

Typical methods include pawn advances, pressure on a file, occupation of entry squares from which a piece can penetrate the opponent's position, and exchanges that damage the pawn structure, meaning the way those pawns are arranged and support one another. The attack works best when pieces can arrive quickly and the center does not permit an immediate strike against one's own king. A lead in development, meaning more pieces are active on useful squares, and the initiative, the ability to pose threats that require answers, reduce the defender's time to organize.

Training platforms often use the label more narrowly for an attack against a king castled on the queenside. In general strategy, it is broader: play on that wing need not be a mating attack, whose aim would be checkmate. The player must also compare speeds, because the opponent may generate counterplay, active play that demands a response, in the center or on the other wing.