Recently, a shocking scandal has rocked the world of Chinese chess. An investigation by the General Administration of Sport has uncovered a significant number of "buy-sell chess" incidents on the chessboard. Simply put, some players deliberately concede or throw matches for their own benefit, even going so far as to "pre-arrange" the outcome of games. This incident has not only disappointed many chess enthusiasts but also raised doubts about the fairness of the entire sports industry. The exposure of this event reveals that it is actually "black money transactions" behind the scenes. "Buy-sell chess" sounds like a plot from a novel, but it is indeed happening on our real-life chessboards. Since 2012, with the increasing professionalization of chess, more and more players have joined the industry. However, no one expected that as the number of competitions increased, the transactions behind the scenes would become increasingly rampant. The "main characters" of the buy-sell chess are no longer just the games themselves, but the players who have undisclosed agreements and interest chains behind them. The investigation shows that some players reach a "tacit understanding" with their opponents before the game: I let you win, and you let me win. These transactions are often related to bonuses, rankings, and promotions. After all, the prize money for chess is not generous, and many players' incomes are not enough to cover living expenses. To maintain their careers, even some well-known players have begun to "trade" match results behind the scenes. In the past, we always thought of chess matches as serious and full of wisdom,…