《魏书·列传·卷六十三》
当初，尔朱世隆曾经与吏部尚书元世隽下棋，突然听见棋盘上哗然声响，一局棋子全都倒立起来，尔朱世隆十分厌恶。
初，世隆曾与吏部尚书元世俊握槊，忽闻局上欻然有声，一局之子尽皆倒立，世隆甚恶之。
In the beginning, Erzhu Shilong was playing chess with the minister of the Ministry of Personnel, Yuan Shijun, when all of a sudden there was a loud noise on the chessboard and all of the chess pieces flipped over. Erzhu Shilong was very disgusted.