BQM117

Diagram 1: Failed attempt to kill  

PurpleHaze:

Hikaru79  

I think this is what would happen after your variation... white looks pretty live to me =(

Hikaru79  

This kills white (as far as I can tell). -Jesse

This maybe?  

Hikaru79: I think black playing the 3-3 point is vital (clamp). Because of black's surrounding stones, white can't connect back to her stones on the right. I think this was the way to play. (Eagerly awaiting to be proven wrong)

Another possibility  

ChrisSchack: I think this is ko for life. Note, however, that White's right side is seriously damaged by this, whichever way it goes.

Attempt to kill outright  

Charles I don't find a very credible invasion. I'd be tempted to play , and to kill White on the largest possible scale.

outright kill continued  

Klaus: Charles is surely right. looks like a horrible overplay to me. We "lesser players" should try to find a plausible killing sequence after . (which Charles should not provide yet, we want to have our fun first!)

Outright kill executed  

This variation seems reasonable to me.

No ko!  

Klaus: Threatens to play at , which would make a a false eye, and reduce the eyespace too much for white to live.

After this sequence, c and b are miami (miai) to kill^[1], even if white had already connected the ko.

Another variation  

White can get at most a dead LGroup. MK

Klaus: I tried to post the same sequences, some seconds after you, so I just added my unnecessary explanations.