 Rambai muchinyora ndima iyi - Choi akakwanisa kumhanya mamita 200 achikwikwidza pachipfuva chevarumepa 2012 Summer Olympics muLondon, nokuputsa rekodhi yeSouth Korea uye kubvisa FINA A-standard nguva ye2:11.17 kubva kuFINA World Championships muShanghai, China. Akadenha vamwe vanoshambira vanomwe pakupisa kwechitatu, kusanganisira aimbove menduru yesirivha Dániel Gyurta wekuHungary uye anofarira munharaunda Michael Jamieson wekuGreat Britain. Choi akamhanyira kunzvimbo yechinomwe neasingasviki 0.04 yechipiri shure kweUkraine Igor Borysik muna 2:13.57. Choi akakundikana kuenda kumasemifinal, sezvo akaisa makumi maviri neshanu pakupedzisira mumakwikwi ekutanga. 