"어떻게 이기는지 아세요?"
Translation:Do you know how to win?
이기다: to win
-는지: change the preceding part to combine it with verbs like 알다 (know) and 모르다 (not know). You would use -는지 for sentences that contain question words, e.g. "do you know how to...", "I know what...", "He knows where...".
아세요: polite 세 form of 알다.
Hope this helps.