The World Chess Championship 1886 was the first official World Chess Championship match contested by Wilhelm Steinitz and Johannes Zukertort. The match took place in the United States, the first five games being played in New York City, the next four being played in St. Louis and the final eleven in New Orleans. The winner was the first player to achieve ten wins. Wilhelm Steinitz won the match 10–5, winning his tenth game in the twentieth game of the match (with five losses and five draws).
Previously, there were a number of "unofficial" world championship matches held between the undisputed leading players of the day, but talk of an official World Championship did not occur prior to the 1866 match between Steinitz and Adolf Anderssen. Steinitz won that match (+8−6=0) and although he made no known reference to a "World Championship" at the time, in later life he would sometimes backdate the tenure of his reign to the date of the Anderssen match. However, most historians now accept that the 1886 match between Steinitz and Zukertort was the first official World Championship match.
Though not yet officially an American citizen, Steinitz wanted the United States flag to be placed next to him during the match. He became a U.S. citizen on November 23, 1888, having resided for five years in New York, and changed his first name from Wilhelm to William.
At the London 1883 chess tournament, a prestigious 14-player, double-round, all-play-all tournament, Zukertort was the convincing winner with 22/26, ahead of Steinitz (19/26), Blackburne (16½/22) and Chigorin (16/22). In many respects, the event resembled a modern day Candidates Tournament, in that most of the world's leading players took part and the top two cemented their reputations as contenders for a world title.