Daniel,
12.b3 h5 13.h3 hxg4 14.hxg4 Ng6 15.Bg5 Bb5 16.Rc1 Nc6 17.Nfe1 Be7 18.Bxe7 Kxe7 19.Bxb5 Qxb5 20.Ng2 Rh3 21.f4 Qb6 22.Qd2 Rah8 23.Rcd1 Nh4 24.Qe2 Nxg2 25.Qxg2 Qa5 26.Rf3 Rxf3 27.Qxf3 Qxa2 0:1 Bjarnason,O - Del Rio Angelis,S Port Erin IOM 2003 (from your earlier post)
Je croix que la partie Bjarnason-Del Rio est peut-etre meillieurs pour les blancs. Le coup 15.Bg5 (15.Cg5) n'a pas du point. Apres 15.Kg2 (Rg2), et puis Tf-h1, les noirs ne sont pas si bien. (It's been a long time since I tried to write in French. I still read Le Monde and Europe Echecs, but reading and writing are two different skill sets. If I made a mistake in my French, please let me know, but be patient with me.

)
You requested serious, deep study, and I've only looked at the position without the aid of the computer for a few minutes. Yet I do prefer White in this line.
White should be careful not to trade off his dark squared bishop as easily as he did here. Perhaps he also made a mistake in trading off the light squared Bishop. I'm not sure.
Do you know if there have been any other tests of this line apart from the blunderful game Bjarnason played?
12.b3 h5 13.h3 hxg4 14.hxg4 Ng6 15.Bg5 Bb5 16.Rc1 Nc6 17.Nfe1 Be7 18.Bxe7 Kxe7 19.Bxb5 Qxb5 20.Ng2 Rh3 21.f4 Qb6 22.Qd2 Rah8 23.Rcd1 Nh4 24.Qe2 Nxg2 25.Qxg2 Qa5 26.Rf3 Rxf3 27.Qxf3 Qxa2 0:1 Bjarnason,O - Del Rio Angelis,S Port Erin IOM 2003