A decisive or critical moment; the turning point where the outcome is determined.
サッカーの試合は後半の最後の10分が勝負どころだった。
The last ten minutes of the second half were the decisive moment of the soccer match.
就職活動では面接が一番の勝負どころだ。
The interview is the most critical moment in job hunting.
プロジェクトの納期前がまさに勝負どころだ。
The period just before the project deadline is exactly the critical time.
将棋では終盤が勝負どころになることが多い。
In shogi, the endgame often becomes the decisive phase.