Rich: White wins the race with two liberties. Note that black can't play on any three of white's middle-group liberties, as they're all self-atari.
unkx80: Is also a solution (c.f. Doug's Go Blog)?
Rich: fails, as black can take the two edge liberties in any order without white being able to respond locally; 'a' saves white but fails to capture the black group on the right, as the white group in the corner is one liberty behind in the semai.
unkx80: This is too easy, heh.