interjection
game over!; match!; we have a result!
Exclamation used when a decisive outcome has been reached in a contest, game, or match. Common in sports commentary, board games, and competitive contexts.
最後の一球を打ち返し、勝負あり！
He returned the final shot — game over!
将棋の対局で、相手が投了し「勝負あり」と宣言した。
In the shogi match, the opponent resigned and declared 'shōbu ari!'
Compound of 勝負 (shōbu, 'match, contest') and あり (ari, 'there is'), literally 'there is a result'. The phrase is a conventionalized exclamation used to announce the end of a contest.