We used a robot arm to move pieces because we thought that would look the coolest. Although I agree that the over head camera isn't the prettiest solution. We t

We used a robot arm to move pieces because we thought that would look the coolest. Although I agree that the over head camera isn't the prettiest solution. We thought about using RFID but we were afraid that the thickness of the board could be an issue and the RFID sensor I have found cost a lot if we are going to use 1 for each square.