Markas (Marcos) Luckis (Pskov, 17 January 1905 - Buenos Aires, 9 February 1973) was a Lithuanian-Argentine chess master.
Luckis twice won the Kaunas City Chess Championship in 1927 and 1928.
Markas Luckis played for Lithuania in five official and one unofficial Chess Olympiads.
Luckis won three individual medals: one silver in 1936, and two bronze in 1935 and 1937.
In September 1939, when World War II broke out, Luckis, along with many other participants of the 8th Chess Olympiad, decided to stay permanently in Argentina.
In October 1939, he took 8th at Buenos Aires (Círculo de Ajedrez). The event was won by Miguel Najdorf and Paul Keres. In 1941, he took 5th at Sao Pedro de Piracicaba. The event was won by Erich Eliskases and Carlos Guimard. In 1941, he took 2nd, behind Eliskases, at Montevideo.
Marcos Luckis played several times in international tournaments at Mar del Plata. In 1942, he tied for 6-7th. In 1946, he tied for 5-8th. In 1947, he took 16th. In 1948, he tied for 10-12th. In 1949, he took 5th. In 1950, he took 17th. In 1952, he tied for 11-13 th. In 1962, he tied for 7-8th.
He also played in Argentine championships at Buenos Aires. In 1941, he finished 1st, but he could not win the title as a then-foreign player (Lithuanian citizen). In 1947, he took 2nd, behind Hector Rossetto. In 1961, he took 2nd, again behind Rossetto. In 1963, he tied for 8-9th (Raimundo Garcia won). In 1965, he tied for 10-11th (Raúl Sanguineti won).
In 1951, Luckis tied for 14-16th at Mar del Plata/Buenos Aires (1st zonal tournament for South America). In 1966, he tied for 11-13th at Buenos Aires/Río Hondo (zt).