The robot has always always won in the "stone-scissors-paper"

It is very simple. Scissors cut the paper, the paper covers the stone, the stone crushes the lizard, the lizard poisons Spock, Spock breaks the scissors, the scissors cuts off the lizard's head, the lizard eats the paper, the paper falls under Spock, Spock vaporizes the stone, and, as usual, the stone breaks the scissors.
Dr. Sheldon Cooper.

In July 2012, engineers at the Ishikawa Oku Laboratory at Tokyo University showed their first version of Janken, a robot who skillfully knows how to play rock-paper-scissors. The robot, in fact, consists of three fingers, which, however, are able to fold like the fingers of a human hand and shake like a folded fist. The technical prerequisite for such a slightly frivolous project was that the task was to develop a gesture management system with the shortest possible response time of the system, which is relevant for a number of computer vision system applications.

The main advantage of the robot Janken was that he very quickly reacted to the shape of the hand of the person with whom he had to play, so strictly speaking, there was no talk of "game" as such. Technically, the system was performed as expected: a special high-speed camera recorded the movements of the fingers, the photo was analyzed by the system and, approximately 20 ms after the person showed, for example, “stone”, Janken threw out his answer - of course, such as to beat the person.


Strictly speaking, even such a robot reaction would be enough for entertainment purposes, but since the task was still technical, the engineers were able to improve the response time of Janken by getting Janken 2.0. The authors do not name the exact reaction time, but it is obvious that it is less than the 20 ms mentioned earlier, so now there is absolutely no chance for people.
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This improvement is shown in the diagram below:



And how the game itself actually takes place can be seen in the video:



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