Complex sentence: He won his first-round match at Saint John, New Brunswick 1988 by 3.5-2.5 over Rafael Vaganian; he then lost to Jan Timman by 2.5-3.5 at Antwerp 1989.
Split into simpler sentences: He won his first-round match at Saint John 1988 by 3.5-2.5 over Rafael Vaganian. But he then lost to Jan Timman by 2.5-3.5 at Antwerp 1989.