A successful demonstration of this last idea occurred in the game Pintér–Brynell at the 1998 Elista Olympiad. White answered Black's 21...b5 with 22.b4!, and Black was unable to keep the queenside open with 22...bxa4? because 23.bxc5 Rxb1 24.Rxb1 dxc5 25.Bxc5 would have left White's central pawns unstoppable. After the game's 22...c4 23.a5! Qe7 24.Bd4 Black's queenside play had ground to a halt; Pintér later won with a pawn advance on the kingside.