Buuxi weedha soo socota: Mednis wuxuu kaalinta labaad ka galay 1955 Horyaalka Junior ee Adduunka ee Boris Spassky (labaduba waxay ciyaareen ciyaartoodii). Wuxuu ahaa ciyaaryahankii ugu horeeyay ee ku guuleesta Bobby Fischer tartanka US Championship. Wuxuu ka ciyaaray kooxda Mareykanka ee 1962kii
15th Chess Olympiad oo ku dhammaaday kaalinta saddexaad ee tartanka US Championship 1961<unk>62. Natiijooyinka tartanka waxaa ka mid ahaa kaalinta saddexaad ee Houston 1974, oo ku siman afaraad ee New York City 1980, iyo isla markaana ku siman Puerto Rico 1984. Xiriirka Puerto Rico Chess Federation, halkii uu ka ahaan lahaa Xiriirka Chess ee Mareykanka, ayaa si rasmi ah ugu soo jeediyay horyaalka Grandmaster. Wuxuu ka ciyaaray tartankii Interzonal ee 1979-kii magaalada Riga, oo ah meesha uu ku dhashay.