Changes

;Custom-toolbar Button: (toolbar described below)

;Custom-toolbar Button: (toolbar described below)

;New game: Starts a new game.

;New game: Start a new game.

;Undo: Reverts last move (When playing against the robot, the last two moves are reverted.)

;Undo: Revert last move (When playing against the robot, the last two moves are reverted.)

;Hint: Used to offer a hint to the current player

;Hint: Used to offer a hint to the current player

;Message area: Used to indicate current status

;Message area: Current status, e.g., Hint, Check, Checkmate, et al.

;Stop Button: used to exit the activity

;Stop Button: Exit the activity

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