I am going through Japanese Meijin games in 1990's recently and found this very interesting game. How often can you see groups killed by Square Four? How about in a professional game? And how about two of them in the same game? That's exactly what happened in the game below:
Unfortunately I cannot include this game in Go4Go database for the moment because I cannot find the exact playing date. It is definitely played in 2003 and there is official record of this game in Nihon Kiin website without the date. Can you help?