I thought these were Grandmasters so how are they cheating? Is someone better than him telling him what moves to make? These are guys that can beat computers, how can they cheat?
Computers.
My nephew wrote the world’s best individually programmed chess playing software.
There are computer programs now that can beat any Grand Master is my understanding.
The Stockfish move calculator is almost unbeatable. And yeah, competitive Chess, with lots of $$$$ at stake, is eat up with cheating. It just got exposed in a big way.
The strongest human player (Magnus Carlsen) has achieved a rating of just under 2900. The strongest computer programs (called engines in chess) achieve a rating of over 3500. A difference of 250 is a mismatch. Humans can no longer compete with computers.