World Chess Championship the organisation of the so-called "Prague Agreement" to reunite the world championship. Kramnik had organised a candidates tournament (won later in 2002 by Peter Leko) to choose his challenger. It was decided that Kasparov play the FIDE champion (Ponomariov) for the FIDE title, and the winner of this match play the winner of the Kramnik–Leko match for a unified title. However, the matches proved difficult to finance and organise. The Kramnik–Leko match, now renamed the "Classical World Chess Championship", did not take place until late 2004 (it was drawn, so Kramnik retained his title). Meanwhile, FIDE never managed to organise
World Chess Championship in later life, dated his reign from this 1866 match. In 1878, Johannes Zukertort won the Paris 1878 chess tournament (though Steinitz did not play), and later won the London 1883 chess tournament by a convincing 3 point margin, ahead of nearly every leading player in the world, including Steinitz. This tournament established Steinitz and Zukertort as the best two players in the world, and led to the inaugural World Championship match between these two, the World Chess Championship 1886. This match, won by Steinitz, though not held under the aegis of any official body, is generally recognized as the