C393 Odd Board

"This Go board of yours is too small. It has already reached its end before you even left. It looks like my Go board is about to connect together, but it's already at the edge. How do I go about doing that?" Zheng Lei quibbled.

"Small?" The old man looked at Zheng Lei's face in disbelief. He then lowered his head to look at the chessboard and said