Edge template IV1c

The template:

Red has two main threats:

and

using the ziggurat.

For trying to block the connection Blue has to play on the overlap:

First attempt:

Red 2 threatens to connect to the bottom on the left side and forces a Blue move like 3. Likewise Red 4 forces 5 or similar moves. In the end 6 is safely connected via 2 or 4.

Second atttempt:

Now white has three main threads:

using the ziggurat and

where the group containing 1 is connected to the left via one of the spots marked with + and trivially to the bottom.

The overlap in which Blue has to play:

The 4 different moves are now considered from top left to bottom righ:

Move 1:

Move 2:

The group containing 4 is now connected to the left by one of the threads marked with + and to the bottom via the template IV-2-b

Move 3:

If Blue plays 3 before 5, Red can play 4 before 6.

Move 4:

So all Blue blocking attempts fail.