In the Dragon, Black fianchettoes their bishop on g7, castling on the king's side while aiming the bishop at the center and . In one of the most popular and theoretically important lines, the Yugoslav Variation, White meets Black's setup with Be3, Qd2 and Bh6, exchanging off the Dragon bishop, followed by launching a pawn storm with h4–h5 and g4. To involve the a1-rook in the attack, White usually castles queenside, placing the white king on the semi-open c-file. The result is often both sides attacking the other's king with all available resources. The line is considered one of the of all chess openings.