:
In 2010 [LIT. 5; page 386], Cheng changed the last three moves and let White give atari at the bottom with . Black plays at top before connecting at the bottom with . White gained one point of territory at , but lost one at 170. So Cheng's score (three points for Black) remained stable.
///:
:
But it seems to us that Cheng overlooked that White will gain one point by playing tenuki with and capturing one Black stone at the bottom. Black now can play and to destroy three points of White's territory at the top (171, 174, ), but White will do the same at the bottom with (172, ). White got an additional prisoner, so she is one point better than before.