The world is originally a big chessboard. There are countless small chessboards in the big chessboard. Some of these small chessboards appear according to the natural law, while others are artificially facilitated.

Whichever chessboard is, someone will rush in or be sucked in unconsciously, but he may not be aware of it himself. As now, people caught up in the chess set by Shen Shi-san did not realize that they were only the chess pieces that Shen Shi-san had driven away.

...

From the beginning of his career, Shen 13 inexplicably broke into a chess game. Fortunately, he rushed out of it and made a lot of profits.

Now, he...