Tüdeviin Üitümen (Mongolian: Түдэвийн Үйтүмэн, internationally often Tudev Ujtumen; born 27 August 1939) is a Mongolian chess master.
In 1969, he won West Asian zonal tournament in Singapore.[1] He tied for 20th-22nd in the Interzonal tournament at Palma de Mallorca 1970 (Robert James Fischer won).[2]
In other international tournaments, he took 15th at Sochi 1964 (Chigorin mem, Nikolai Krogius won);[3] took 15th at Sochi 1965 (Chigorin mem, Wolfgang Unzicker and Boris Spassky won);[4] took 9th at Havana 1967 (4th Armies-ch, Vlastimil Hort won);[5] tied for 11-13th at Tbilisi 1971 (Goglidze mem);[6] and took 9th at Dubna 1973 (Mikhail Tal and Ratmir Kholmov won).[7]
Ujtumen played six times for Mongolia in Chess Olympiads (1964–1974). He won individual gold medal at second board (+11 −1 =5) at Tel Aviv 1964 and silver medal at second board (+12 −3 =3) at Siegen 1970.[8]
Ujtumen was awarded the International Master (IM) title in 1966.