Black does lots of things:

It kills the white stones in the corner
It threatens to catch the stones in a net with a move at x
It helps Black's stone
It starts fencing off black territory on the top side, and ...
... it stops White from making the top side into his own territory.
If you found this , you did very well. It kills the corner stones even better, but it doesn't help the stone so well, and it doesn't threaten the stones so much. White can play at , for example.

This is also an good multi-purpose move. White takes care of his stones in the upper left, builds towards territory on the upper side, and leaves the stone weak, but helps that stone and starts to build a large territory in the centre.

If you found any of these moves, well done!

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UK Go Challenge home 1 November 2003