Some friends and I recently reviewed the interesting game below between Kiwada Kazuomi (1p, white) and Ando Kazushige (3p) from January 2009. There was one exchange in particular I found very interesting, and I'd like to hear from others.
First question: Following the sequence to 8, what is the status of white's lower right group?
White takes the Ko first with the marked stone, and lets the group go in the following sequence:
at 
.So what do you think? Did this end quickly in resignation? Who won? Did W make a huge mistake in not making a bigger ko threat, or letting the group die? Before answering, consider the status of Black's upper middle group.
Result: