Edge template VI2a

The edge template template VI2

Let us first see what possibilities Red has if he moves first.

There are two obvious options:

In both diagrams the possible intrusion points are marked by (+). So we only have to consider the intersection of the intrusion points. They are:

If Blue blocks at E5 then Red plays F3, reducing to Template IVb

Likewise if blue blocks at F5:

Blue has four options that don't immediately reduce to another edge template:

Red's G3 piece is connected to the top via F3 or H2.

Here Red has created a Ladder escape fork. If blue blocks the ladder Red plays at D3.

And Red has connected. If blue choose to play at E6 instead of E5:

Play continues...

Red threatens to connect via D4. Blue must respond in one of the marked hexs.

The H4 piece is connected to the bottom with template III-1-a, and is connected to the top in two non-overlapping ways:

and

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