Lionel Adalbert Bagration Felix Kieseritzky (Russian: ??????? ????????? ????????? ?????? ??????????; 1 January 1806 [O.S.
20 December 1805] – 18 May [O.S.
6 May] 1853) was a Baltic German chess master, famous primarily for a game he lost against Adolf Anderssen, which because of its brilliance was named "The Immortal Game".