All The World Chess Champions - Chess.com
www.chess.com › article › viewDec 10, 2021 · Ponomariov won the 2002 FIDE World Championship, a 128-player knockout tournament. GM Rustam Kasimdzhanov (2004t) Photo: Maria Emelianova/Chess.com. Kasimdzhanov won the 2004 FIDE World Championship, a 128-player knockout tournament. GM Veselin Topalov (2005t) Photo: Wikimedia. In 2005, the FIDE World Championship was an eight-player field.