The Go Consultants / Errata

 

It then explains that Kitani did not like to live in this way because "Even without the move of , which is at here, the Black group would have been completely alive with a stone at . But to have this unnecessary stone at just to leave a seki is unbearable for professionals...". This text is correct, however the accompanying diagram removes both the stone and the hane in the corner () and shows the following sequence (left) which is supposed to show black being alive.

However black is not alive here: white can connect at and black cannot connect at the triangled point to avoid a false eye as he is short of liberties (and if he takes the two stones then white plays the triangled point). Presumably the diagram should already have a black stone at (in which case a throw in at is simply answered by capturing it), but the inclusion of the 7-8-9 stones is puzzling.

Bill: The diagram in the Japanese book is this.

 

Without the White connecting stone on C-18 Black is alive. The throw-in at 8 takes away a potential White liberty. :)