Playing here can lead to the mentioned reduction, if Black continues with at a. Other moves seem to fail. What alternatives are there for ? Is White alive?
SnotNose: How does White respond to ?
Klaus: The "Double Hane" seems to kill, cool idea!
However, I'm still not completely convinced. I want to present an idea I found at oki wants tobi:
White seems to be alive here, but of course, Black kan play differently in this case. He might try the vital point, but...
... the sequence a, b, c, d won't kill White, and beginning with will be answered at a. so how is White killed?