Single Comment

Might we substitute the word "can" for "must" in your description of pawns' initial steps? Why?

"WARHEAD Pawn: both steps must be capturing (more aggressive than the above)"

- to say that both steps MUST be capturing is not to make the Warhead pawn more aggressive but to allow the Warhead pawn an initial double step only in the extremely unusual event that two pawns are lined up for it to take. Since an opponent is unlikely to allow that to happen, in practice, that means the Warhead pawn is unlikely to be able to make an initial double step at all.

So in practice, makes it more passive, not more aggressive (unless we substitute "can" for "must.")

Edit: I see my comment is insufficient in light of how you use "may" to introduce combinations of initial-step pawns. I will review and comment again later, unless someone can clear all this up in the mean time. I am now thinking perhaps we can create an even more comprehensive list that is also more plausible - unless you already did that, Charles. I wouldn't put anything past you when it comes to creating authoritative lists.