Mario Bertok

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Mario Bertok (born 2 September 1929) is a Croatian chess player who was born in Zagreb, Yugoslavia.

Bertok earned the International Master title in 1957. He represented Yugoslavia on board four at the 1960 Chess Olympiad, scoring +5=5−3. A second place finish in the 1960 Yugoslav Championship earned Bertok a berth in the 1960 Budapest Zonal where he placed 2nd=, taking third after a playoff. At the 1962 Stockholm Interzonal he finished 17th=. His best international result was Rovinj-Zagreb 1970 where he finished 9th=.

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