In 1971 Soviet grandmaster and concert pianist Mark Taimonov was beaten by US grandmaster Bobby Fischer. Not just beaten, he was slaughtered 6-0, and extremely unusual and humiliating defeat in such a high level chess match.
As a result Taimonov: “… was thrown out of the USSR team and forbidden to travel for two years. He was banned from writing articles, was deprived of his monthly stipend... [and] the authorities prohibited him from performing on the concert platform."
A genuinely communist system would not severely punish someone like that merely for losing a game, no matter how prestigious. That's how dictatorships act, not a democracy based on common control.