Package robocode

## Interface BorderSentry

    public interface BorderSentry

A robot that implements BorderSentry is a robot type used for keeping other robots away from the borders, i.e. guarding the borders in order to prevent "wall crawlers".
Robots that implement BorderSentry have 400 extra life/energy (500 in total), but is placed at the border of the battlefield when the game is started.
Border sentry robots cannot move away from the border area, and they can only make damage to robots that are moving into the border area. The size of the border area is determined by the `battle rules`.
This type of robot is intended for use in battles where robots should be forced away from the borders in order to prevent "wall crawlers".
Border sentry robots does not get scores, and will not occur in the battle results or rankings.

Since:
  1.9.0.0
Author:
  Flemming N. Larsen (original)
See Also:
  `BattleRules.getSentryBorderSize()`, `JuniorRobot`, `Robot`, `AdvancedRobot`, `TeamRobot`, `RateControlRobot`, `Droid`