mid-stage of a campaign; middle phase of a contest
Used for the middle part of a campaign, election, tournament, or similar extended effort. Often implies the critical turning point after the opening moves.
The election campaign has entered its mid-stage, and each candidate's strategy is being tested.
大会の中盤戦で、彼は一気にリードを広げた。
In the middle phase of the tournament, he quickly extended his lead.