<prompt> Qedela umusho olandelayo: UMednis waqeda endaweni yesibili ngo-1955 World Junior Championship ngemuva kukaBoris Spassky ababili balinganisa umdlalo wabo. Wayengumdlali wokuqala ukushaya uBobby Fischer eMqhudelwaneni Wase-U.S. Wadlala eqenjini lase-US ngo-1962 e-  <response>: I-15th Chess Olympiad futhi yaqeda ngokulingana endaweni yesithathu ku-196162 U.S. Championship. Imiphumela yalo mqhudelwano yayihlanganisa indawo yesithathu eHouston ngo-1974, indawo yesine ngokulinganayo eNew York City ngo-1980, kanye nendawo yokuqala ngokulinganayo ePuerto Rico ngo-1984. I - Puerto Rico Chess Federation, hhayi i - United States Chess Federation, yamphakamisa ngokusemthethweni ukuba athole isihloko se - Grandmaster. Wadlala emqhudelwaneni we-Interzonal ngo-1979 eRiga, lapho azalelwa khona. 