Dux Bellorum: Stumped by a rules query

The stumbling block

I enjoyed Dux Bellorum but haven’t played it for a long time. I was keen to start playing again, but our first game was almost immediately stymied by a rules query which I don’t remember encountering before. The query stopped us in our tracks and we have been debating it ever since without agreeing on a solution.

The query relates to Shooting but also concerns Uncontrolled Charges as the rules use the same wording. (It also touches on an optional rule, Line-of-sight Charges.) It is thus pretty fundamental.

I would normally hope to get an answer from a forum, but Dux Bellorum was published in 2012, the world has moved on, and the Tapatalk board is pretty quiet.

According to the rules, a unit's Line-of-sight is constrained by a 45 degree angle and the whole of the nearest edge of the target unit must be visible to the shooting unit. In the accompanying diagram, however, valid targets are indicated even though their nearest edges are not wholly within the Line-of-sight.

I’ve tried all sorts of ways to make sense of this, but I won’t confuse the picture with my speculations.

If anyone reading this still plays Dux Bellorum and can explain it, please help us out so I can enjoy a relaxed Yule!

Update

Please see the Postscript 4 at the end of the next post for a solution.