The easiest way to solve this is to look for a click on the arrow instead of the chess. By the way, this also allows movement to square without a chess on it. If you just wanted to select a different chess and show arrows around it, you could have it so if you click anywhere except on an arrow, the arrows are removed, and if that click was on a different chess, show the arrows around it (if the click was not on a chess, no arrows will be present, and you can then click on any chess).