Life In 19x19

Oooh, that's nice.

Cheers, I'd never have seen that.

I've been working though Davies' Tesuji book, and I don't think the solution to snapback problem 2 on page 31 works (or at least, it ends in a ko).

Here's the problem (white to play and capture the big clump of balck stones):
$$W
$$ -------
$$ ......|
$$ ..OOO.|
$$ .OXOX.|
$$ .OXXXa|
$$ .OX.O ...