Johannes Hermann Zukertort (Polish: "Jan Hermann Cukiertort"; 7 September 1842 – 20 June 1888) was a Polish-German-British chess master. He was one of the leading world players for most of the 1870s and 1880s, but lost to Wilhelm Steinitz in the World Chess Championship 1886, which is generally regarded as the first World Chess Championship match. He was also defeated by Steinitz in 1872 in an unofficial championship.