 Nyora kupfuurira kweiyi ndima - Aitken akadzidza chess kubva kuna baba vake pazera remakore gumi. Akanga ari mukwikwidzi weScotland muna 1935, 1952, 1953, 1955, 1956, 1957, 1958, 1960, 1961 uye 1965, wekupedzisira pamwe chete naPM Jamieson. Akanga ariwo London Champion muna 1950. Muna 1959 akawana mugumisiro wake wakanakisisa muBritish Championship, achipedza akabatanidzwa panzvimbo yechinomwe. Aitken akamirira Scotland mumakwikwi mana eOlympics. Akatamba bhodhi repamusoro paStockholm 1937, achiwana 32.4 chete asi akakunda GM wekuSweden Gideon Ståhlberg ndokurova neGM wekuAmerica Samuel Reshevsky. Akatamba bhodhi rechipiri kuMunich 1958 uye Tel Aviv 1964, achiwana 67.6 uye 28.1 zvichiteerana. Aitken akatamba bhodhi rechitanhatu kuSkopje 1972, achiwana 38.9. 