出其不备

bǐ sài zhōng wèi le chū qí bú bèi yǐ kuài zhì shèng dōu yùn yòng le kuài sù fǎn jī zhàn shù

比赛中，为了出其不备，以快制胜，都运用了快速反击战术。

In a competition, in order to catch the opponent off guard, rapid counter-attack tactics have been adopted.