Sherlock Holmes 2 : what game is he playing ?

Hello BFAs : Mathieu here wishing you all a very Merry Christmans, Hannuka, vacation, and all that jazz.
For all you cinemaphiles, Sherlock Holmes: A game of shadows is finally out, and quite satisfying. The directors decided to play with the character of Prog. James Moriarty in such a way that we didn't expect : he isn't a bitter enemy if Holmes (as most other movies depict him) and faithfully with Connan Doyle's work he shows instead, a wide web of plannings (mixing crime with European politics) that Sherlock, his brother Mycroft, Watson and the gypsy Sim can barley keep up with (I refuse to say more lest I spoil the film). Robert Downery Jr. and Jarred Harris stray very little from the book's eccentric sleut, and the Napoleon of Crime respectivly. The end remains to DIE for...