一著不慎,滿盤皆輸 [ㄧ ㄓㄠ ㄅㄨˋ ㄕㄣˋ , ㄇㄢˇ ㄆㄢˊ ㄐㄧㄝ ㄕㄨ; yi1 zhao1 bu4 shen4 , man3 pan2 jie1 shu1] One careless move and the whole game is lost. (idiom) ◄ ►