<prompt> Ngwala go tšwela pele ga serapa se - Aitken o ithutile chess go tatagwe ge a be a e-na le nywaga e 10. E be e le nkgwete ya Scotland ka 1935, 1952, 1953, 1955, 1956, 1957, 1958, 1960, 1961 le 1965, ya mafelelo e kopane le PM Jamieson. E bile e bile e le Mofenyi wa London ka 1950. Ka 1959 o ile a ba le mafelelo a gagwe a mabotse kudu go British Championship, a fetša a le maemong a bošupa. Aitken o ile a emela Scotland ka di-Olympiad tša Chess tše nne. O ile a bapala top board kua Stockholm ka 1937, a thopa 32.4 fela eupša o ile a fenya GM wa Sweden Gideon Ståhlberg gomme a thapa le GM wa Amerika Samuel Reshevsky. O ile a bapala kgwele ya bobedi kua Munich ka 1958 le Tel Aviv ka 1964  <response>: , e bile 67.6 le 28.1 ka go latelana. Aitken o ile a bapala kgwele ya botshelela kua Skopje ka 1972, a hwetša 38.9. 