As part of the sp2b 2020 virtual conference on quantum computing, an official “quantum chess” tournament was hosted for the first time in history. the winner was alexander kubica of amazon, who beat doug’s load of google. the latter do not have enough time to make the necessary calculations.

The author of this game is Chris Cantwell of Quantum Realm Games, who came up with it when he was a graduate student studying quantum mechanics. He wanted to transfer complex principles of quantum physics to the real world, adapting them for some practical application, but to preserve quantum nature itself. The choice fell on chess, as a game in which there is an almost infinite variety of situations on the field, so the player must be able to anticipate events and take into account the different probabilities of its occurrence. Just like in quantum computing.

Quantum Moves

In this game, the rules of farmers remained unchanged, but the pieces were able to make “quantum moves” along with the usual ones. For example, you can move a queen to a superposition when there is a 50% probability of being on any of the two cells. It looks as if on one board it has been moved, and on the other has been in place, but since players cannot see two boards at the same time, everything appears with the conditional sign of one. These are problems for the opponent – try to calculate which of the two ladies in the superposition the opponent to move to the next move, and which will disappear?

To navigate the quantum chess, it is not enough to know the principles of superposition, entanglement and interference, you need to develop intuitive thinking about what happens in the quantum multi-universe. As the author of the game himself notes, he deliberately created the complex, focused on intellectuals and people with developed abstract thinking. As the physicist Stephen Hawking, actor Paul Rudd and director Alex Winter, who in 2016 recorded an advertising film to promote quantum chess.