Answer

 






All the black stones are dead and all the white ones are alive!

If White needs to capture Black, he can put him in atari like this, and it's all over.





 
If Black is to save himself, he needs to capture the white stones inside. But is no good - Black is putting himself into atari!





 
And this is even more useless - White just ignores it. Next, Black at x would still be self-atari!







 
Since the big black group is dead, the white stones on the inside must be alive. Black can't capture them, as we saw. And that means that the single black stone on the inside is dead too.





Did you solve it? If so ...

Congratulations!

 

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UK Go Challenge home 1 November 2003