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Illegal Move
(Moved from WhatIsGoAbout. I'm not aware of any page about Illegal Moves. If there is any, please move them together (legally ;-) ) Andrew Grant: Recently (on 2nd Oct. 2003) Cho Hunhyeon played an illegal? move in a major tournament game and had to forfeit the game.
Black 1 seems bizarre, but Cho was probably intending to take the ko at a and just played on the wrong point. It's easy to make this kind of blunder if a ko is involved. Most likely Cho's mind was preoccupied with counting and evaluating ko threats, and he failed to pay due attention to the trivial task of taking the ko. Something similar happened a few years ago in (I think) the Meijin tournament in Japan, where Cho Chikun took a ko without making a threat. But on that occasion the game was annulled rather than forfeited, since Cho had asked the referee if it was his turn to take the ko and the referee had answered wrongly.
uxs: Black playing at a instead of at 1 seems bizarre too. White seems to be in such a better position there that black should just give up and tenuki, imho. This is a copy of the living page "Illegal Move" at Sensei's Library. ![]() |