What "battery" means in chess
A battery refers to a tactic in which two pieces are aligned on the same file, rank, or diagonal, creating a powerful attacking force that can threaten multiple targets simultaneously. The most common battery is a queen and a bishop or a queen and a rook, but other combinations are possible. The battery can be used to put pressure on the opponent's pawns, pieces, or king, and force them to make defensive moves or sacrifice material. It is often a key element of a successful attack or a decisive combination.