[verteu]

He made a great move in the game, but completely mis-analyzed the reason it works during the post-game interview [1]. Several GMs found that suspicious, especially given revelations that he'd previously admitted to cheating.

Specifically, move 19. Qd3! [2], appears to hang the knight. When asked how he'd respond if his opponent simply took the knight (19... dxc4), he says he is "completely winning", then proceeds to give some moves that lead to a flat-out losing position. (Eg: Any GM or sufficiently strong engine agrees that r2q1rk1/1pbn1p2/2p1b1pB/p3P3/P1p2P2/2P3QP/1P4P1/3RRBK1 b - - 0 1 is lost for White.)

To be fair, he's been playing incredibly well recently, and no other evidence of cheating came out, so I'm inclined to believe it was just a "bad interview."

[1] https://www.youtube.com/watch?v=rI9jAU0jhJU

[2] https://www.chess.com/events/2022-sinquefield-cup/04/Niemann...