<prompt> Bhala ukuqhubeka kwalesi sigaba - U-Aitken wafunda ukudlala i-chess kuyise eneminyaka eyishumi. Wayengumpetha waseScotland ngo-1935, 1952, 1953, 1955, 1956, 1957, 1958, 1960, 1961 nango-1965, owokugcina ngokuhlanganyela ne-PM Jamieson. Wayebuye abe yiNgcweti yaseLondon ngo-1950. Ngo-1959 waba nomphumela wakhe omuhle kakhulu eBritish Championship, waqeda ngokulingana endaweni yesikhombisa. U-Aitken wamelela iScotland emidlalweni emine yama-Olympics. Wayedlala i-top board eStockholm ngo-1937  <response>: , uthole amaphesenti angu-32.4 kuphela kodwa wanqoba i-GM yaseSweden uGideon Ståhlberg futhi walinganisa ne-GM yaseMelika uSamuel Reshevsky. Wadlala ebhodini lesibili eMunich 1958 naseTel Aviv 1964, wahola u-67.6 no-28.1 ngokulandelana. U-Aitken wadlala ebhodini lesithupha eSkopje ngo-1972, wathola amaphesenti angu-38.9. 