Nice photos, very helpful clearing things up in my mind. And I had cavalry BGs in mind when I was thinking about this, you read my mind.
A couple of things though:
petedalby wrote:When I play, I believe the corner that touches both enemy BGs shold be the one to move the appropriate distance.
Not sure about this, you may end up under or over measuring the distance, as the shift is free (although shifts being free is mentioned only for advances in the movement section, the diagram on p163 implies it's also free for evaders, and thus routers, unless I've missed something in the rules).
In this case I doubt it would makes any difference, but I would argue it's better turn 180 on their rear, and measure straight forward moves and wheels as normal - otherwise you might end up with situations where routers/evaders escape pursuers/chargers when they shouldn't, or vis-versa. Especially important with evaders...
petedalby wrote:The 3rd photo shows the Thessalians wheeling to hit the routers. The Companions move second and by dropping a base can also hit the routers. This will cause the routers to lose 2 bases.
Surely the Thessalians would wheel on their right corner first until they are following along the routers' "path", ie moving parallel to it? This would block the Companians contacting the routers.
Granted the rules wording "wheel to follow" is a bit loose, but where you placed them would mean they've wheeled beyond that path.
Hasten to add I'm not nit-picking, just I don't think in either case both BG's would stay in contact (much as one might want them too - notice I assume I'm always on the winning side

)
Any thoughts on unintentional contact of the first 2 ranks in combat by pursuers or chargers into revealed targets?