White is Honinbo Dosaku, Meijin. Black is Pechin Hamahiga. The game is known for a trap set up by Dosaku. In the basic joseki dictionary of Ishida Yoshio, there is a reference to this game, which Ishida considers as the first ever official international go game.
In fact in the actual game Black played at a and avoided the trap. The diagram below is often mistakenly given as the actual game continuation; it is not.
- Basic Instinct Counterexample for the same sequence.
- The above game is also included in the chapter "Wonderful Wedges" of Weird and Wonderful - Volume 1 - Extraordinary Moves by Professional Go Players, along with two examples of the symmetry-exploiting wedge from professional play.