The main line, as often seen in life-and-death problems, is this sequence from
to
.
Here,
reduces the number of liberties of the
chain to only two, so
becomes an atari which nullifies the possible eye at
.
seems to denote a willingness to save the corner, but then the tenuki at
lets Black kill it.
13 moves later,
does not revive the corner but creates endgame aji.
Reference:
Link to game record in GoBase
[1]
AWA's questions about the solution have been moved to /discussion.