Lionel Adalbert Bagration Felix Kieseritzky was a Baltic German chess master and theoretician, known for his contributions to chess theory, as well for a game he lost against Adolf Anderssen, known as the "Immortal Game". Kieseritzky's name became associated with several openings and opening variations, such as the Kieseritzky Gambit, Kieseritzky Attack, and the Boden–Kieseritzky Gambit.
Lionel Kieseritzky
Karl Ernst Adolf Anderssen was a German chess master. He won the great international tournaments of 1851 and 1862, but lost matches to Paul Morphy in 1858, and to Wilhelm Steinitz in 1866. Accordingly, he is generally regarded as having been the world's leading chess player from 1851 to 1858, and leading active player from 1862 to 1866, although the title of World Chess Champion did not yet exist.
Howard Staunton was the principal organizer of the 1851 London International Tournament, and offered to pay Anderssen's travel expenses, should he fail to win.
Paul Morphy defeated all opposition in 1858.
Wilhelm Steinitz in 1866
Anderssen (far left below) depicted with other leading players