Edge template IV2j

The template:

(From: www.drking.org.uk)

Red has two threats:

and

For a blocking attempt Blue has to play on the overlap field:

Red 4 is connected to the bottom and also to the top by one of the two fields marked with +.

This template has an extraneous hex. The correct template is:

The first threat needs to be modified to:

There are now two overlap points. The response to the first is the same as above. The response to the second is:

See also

Multiple threats