Pawn storm
A coordinated advance of multiple pawns toward the enemy king, intended to open lines and create attacking threats.
A pawn storm is the systematic advance of three or four pawns against the enemy king. The goal is not to win a pawn or two — it is to open lines. Each pawn that exchanges or advances past an enemy pawn opens a file or diagonal for the attacker’s pieces, and at some point the king becomes exposed enough that a direct attack succeeds.
Pawn storms are most common in positions with opposite-side castling. White has castled queenside; Black on the kingside; both sides push their flank pawns at the enemy king without weakening their own. The first attack to arrive usually wins, and these games are sometimes decided by a single tempo — which is why opposite-castled positions are among the sharpest in chess.
The Yugoslav Attack against the Sicilian Dragon is the textbook example. After castling on opposite wings, White advances h4-h5, g4, and eventually hxg7 or h6, opening files toward Black’s king. Black responds with …b5, …a5-a4, and …Rc8, opening files toward White’s king. Both attacks are real; the move-by-move accuracy is what decides.
Pawn storms are dangerous to launch with one’s own king on the same side. The pawns that advance leave squares behind them weakened, and a counterattack that finds those squares often arrives faster than the original storm.