Tüdeviin Üitümen (Mongolian: Түдэвийн Үйтүмэн, internationally often Tudev Ujtumen; born 27 August 1939 – died 1993[1]) was a Mongolian chess master.
[2] In 1969, he won the West Asian Zonal tournament in Singapore.
[3] He tied for 20th-22nd in the Interzonal tournament at Palma de Mallorca 1970 (Bobby Fischer won).
He took 15th at Sochi 1964 (Chigorin memorial, Nikolai Krogius won);[5] took 15th at Sochi 1965 (Chigorin memorial, Wolfgang Unzicker and Boris Spassky won);[6] took 9th at Havana 1967 (4th Armies-ch, Vlastimil Hort won);[7] tied for 11-13th at Tbilisi 1971 (Goglidze memorial);[8] and took 9th at Dubna 1973 (Mikhail Tal and Ratmir Kholmov won).
[9] Ujtumen was a three-time winner of the Mongolian Chess Championship, in 1972, 1978 and 1986.