However, White did not need to connect either ko on the right after having forced Black to connect on the edge. He could apparently then play as he did in the game, that is at White 11 as follows:
This would then continue as follows:
We now have a full-blown triple ko but with the special condition (according to Zhang - we are not pretending to understand any of this) that there is still a liberty at A.
We will come back to this position in a moment, but first consider what would have happened had Black tried to start the capturing race by filling in this liberty first, with this version of move 26:
Now when White plays 29 at the triangled point, this results in a phantom double ko, by means of which White easily kills Black.