RTG Problem 78 / Solution
The status of the Black group is dead. However, problem solvers are expected to find correct refutations for the possible resistance by Black, especially those that threaten life by under the stones.
The aforementioned under the stones refers to a result like this. Of course,
is wrong.
Therefore, the correct way to respond to
is to throw-in at
. This prevents Black from living by under the stones.
Similarly, the descend of
should be answered by
here, and not a.