Thanks to the position of and the throw-in at
, there is shortage of liberties.
This is yet another application of the oki wants ikken tobi shape.
Many players would play the atari. Now White no longer fears shortage of liberties, and Black is dead. This is terribly vulgar. It does not use at all.
( at
)
Other will see the throw-in at , and then follow this diagram.
seems to work, but White simply descends at
and Black can't connect at a - shortage of liberties !
Go to Problem 49
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