scmJS docs

Opponents

True when the player has at least, at most or exactly the number of opponents still in the game. Blizzard's melee maps carry the standard victory trigger, a player with no opponents left wins:

Condition 14 · Opponents(Player, Comparison, Amount);

Argument Takes Stored in the condition
Player a player or group bytes 4–7
Comparison At least, At most or Exactly byte 14
Amount a whole number, 0 to 4,294,967,295 bytes 8–11
Opponents("Current Player", At most, 0);