This is an amazing Sicilian played by Topalov. Well worth look Svidler vs Topalov, 2005  (B90) Sicilian, Najdorf, 44 moves, 0-1 Great use of ZugZwang. Perhaps the best game i've ever seen Saemisch vs Nimzowitsch, 1923   (E18) Queen's Indian, Old Main line, 7.Nc3, 25 moves, 0-1 Spielmann exploits a pin superbly Spielmann vs R Wahle, 1926  (C01) French, Exchange, 17 moves, 1-0