All you need to know about Carpenter's Square - 22
Submitted by macelee on 2013-02-07 06:43; Last upda
ted on: 2018-11-17 17:25
Diagram 22.1: White to play
We already learned that attacking at 'a' from outside is not working. What else?
Diagram 22.2: Solution
is urgent. If 
connects, after forcing moves 
and 
, 
simply reduces the eyespace to kill.
Diagram 22.3: Variation
If , is a good move. White again can kill straight-forwardly. 
at 'a' is useless too.
Diagram 22.4: Variation
is an alternative way to kill. After 
, 'a' and 'b' are miai points.
Diagram 22.5: White fails
gives away the key point to black. There is no way to kill this corner any more.
Conclusion: This shape is quite simple. As long as white gets the key 2-2 point, black has no chance.
