Slitherine

I'm not sure if this is a bug or intended. I noticed that phalanx do not get deep pike bonus in impact phase when defending against attack made from rough terrain. The phalanx itself is in open ground (hill), so to my knowledge such fight is treated as if it was happening in the open ground for the defending unit and in rough terrain for the attackers.
As you can see, the bonus is visible for the later combat phase (but that is applied regardless of whether it is open ground or not).

edit: I should perhaps note that this is in the version for FOG Empires beta.

It is WAD.

From the manual:

17.4. Close Combat on the Edge of Terrain
If troops inside a terrain feature are in close combat with troops outside, then
the troops outside will suffer the disorder penalties as if inside the terrain if
they are attacking into it, but not if the enemy is attacking out of it. Either way
the combat will not count as if “in open terrain”.

Although it is working as per the stated rules, I do agree that it seems a bit odd in this particular interaction, and we may want to review this rule.

Ok, thanks, I didn't think to check the manual.