The deciding game in a match (such as the fifth set in a best-of-five volleyball match) played when both sides have won an equal number of sets

To determine victory or defeat; to struggle for supremacy; to see who wins or loses

(idiom) to be able to plan a successful outcome from a long distance away; often used to describe a military commander or leader who develops a winning strategy from their headquarters

To compete with one another to determine who is the winner and who is the loser; to have a final contest for victory.

(idiom) to devise strategies within a command tent and achieve victory on a battlefield a thousand miles away; refers to a military commander or leader who can masterfully plan success from a distance