: ( 563)
If Black does not play the atari in the lower right, ...
:
... White will pre-empt it in sente.
///:
:
Later, White again will choose the Semeai Variation.
:
Again, the outcome of the semeai remains unaffected - Black's group in the top right dies, White's group in the lower right also dies. White has not only gained two points by the -/-exchange, but also got an additional point of territory at .