Door Group Exercise 2 / Solution
Solution
![[Diagram]](../../diagrams/35/cb223e4445258bf1bab89ce112fc8e4a.png)
Black is dead
With no Black stone at both a and b, the Black group dies. After
, since White can always occupy one of a and b, Black is unable to get a seki.
Failure
![[Diagram]](../../diagrams/32/3562fd1936960c5493c5b68f9005947c.png)
Mistake
A common mistake is to assume that
will be played as shown in this diagram. In this case,
and
lives because White cannot connect at a.