Defending against intrusions in template 1-IIIb
The edge template III-1-b
 |  |  | | | | | | | | | ||||
 |  | |  |  | |  | ||||||||
 | | | | | | | ||||||||
| | | | | |  | ||||||||
|  | | | | | |||||||||
Red has two main threats:
| | | | | | | | | | | ||||
| | |  | | | | ||||||||
| |  | | | | | ||||||||
| | | | | | | ||||||||
| | | | | | |||||||||
and
| | | | | | | | | | | ||||
| | | | | | | ||||||||
| | | | | | | ||||||||
| | | | | | | ||||||||
| | | | | | |||||||||
These moves lead to easy direct connection. Because there is no common hex used in both threats, Blue cannot prevent Red to link to the bottom.