승부수가 · 승부수를
decisive move, game-changing gamble
Example
회사는 신제품 출시로 마지막 승부수를 띄웠습니다.
The company made its final decisive move by launching a new product.
Word parts
승 win+부 lose+수 move
From the game of baduk: literally 'the move that decides win or loss'.
Good to know
Common verbs: 승부수를 던지다 or 승부수를 띄우다 (to make a bold, decisive move).