User:Bobson8

The following template guarantees a stone on 7th row to connect to the edge. It was verified by me using HexProver developped by mirefek. This answers the single-stone 7th row edge template problem. Whether this template is minimal is not known.

To start with, one notice that Red can connect to the edge with a variant of edge template V1b from both sides.

Thus Blue has these possible blocks (a~j, mirrored positions are removed).

For Blue playing a,b,c,d, Red can respond with X,Y,Y,Z respectively. For the rest Red can respond with b.