It consists in : the 2.40 version with a Null-Move supposed to work (but not sure to be efficient in all the situations, i.e. zugzwang), and also a lot of special endings which are very useful (Bad bishop,. bishop+pawn,...). Seems to give some elo points, I would say 100 elo. My testing methodology is to play tournaments against different opponents of approximately the same level, including also the previous version of Milady.