So how does the robot always win? The answer is simple: The robot cheats. The researchers explain that the robot makes its move one millisecond after its human opponent has made his or her move. The wrist joint angle of the robot hand is controlled based on the position of the human hand. The vision recognises one of rock, paper and scissors based on the shape of the human hand. After that, the robot hand plays one of rock, paper and scissors so as to beat the human being in 1ms.

A robot that will win rock, paper, scissors 100% of the time sounds kind of annoying to us, but the researchers said the technology shows the possibility of cooperation between humans and machines in just a few milliseconds. The researchers suggest this technology can be applied to motion support of human beings and cooperation work between human beings and robots without time delay.