A50: Queen's Fianchetto Defence (1 d4 Nf6 2 c4 b6)
1.d4 b6 2.c4 Bb7 3.Nc3 Nf6 4.d5!? this advance is a little unusual, although objectively there is nothing bad about it [4.Nf3 e6 5.a3 d5 6.cxd5 Nxd5 7.Qc2 Nxc3 8.bxc3 Be7 9.e4 0-0 10.Bd3 c5 11.0-0 Qc8 12.Qe2 Ba6 13.Rd1 Bxd3 14.Rxd3 Nd7 15.e5 Qc6 16.Bg5 Rfe8 17.Bxe7 Rxe7 Radjabov-Anand, Linares 2003 ended in a draw a few moves later]
4...e5 Black has to be careful not to justify White's play, I think this and .. Bb4 is the start of a plan that probably isn't best [4...e6 5.a3 exd5 6.cxd5 b5! is another way to play this]
5.e4 Bb4 6.Bd3 0-0 7.Nge2+/= a5 [3 months earlier in San Jose in a game between 2 Experts 7...Be7 was tried]
8.0-0 Na6 9.Bg5 [9.Na4 Nc5+/= ]
9...h6 [9...Be7 10.Be3= ]
10.Bxf6 [10.Bh4 c6+/= ]
10...Qxf6= 11.f4 Bc5+ 12.Kh1 Rae8 13.f5 d6 [13...c6 14.Rf3= ]
14.Rf3 Kh7 15.Ng3 Qg5 16.Qe2 Bd4 17.Raf1 f6?! Black's queen is now in a precarious position [17...c6 18.dxc6 Bxc6 19.Qe1= ]
18.a3 [18.Nb5 Bc5+/- ]
18...Nc5 [18...Bxc3 19.bxc3 Nc5 20.Rb1+/= ]
19.Bc2 Ba6 [19...Re7 20.Rb1+/= ]
20.b4 axb4 21.axb4 Nd7 22.Ba4 Re7 23.Bc6 Kg8 24.b5 [also strong is 24.Nb5 Nb8 25.Na7 b5 26.cxb5 Bxa7 27.bxa6 Nxc6 28.dxc6 Rd8+- ]
24...Bc8+/- 25.Na4 Kf7 26.Rd3 [>=26.Qd3+/- ]
26...Rh8? [Black really has to bail out of this position by giving up a pawn now, otherwise it gets worse >=26...h5 27.Nxh5 (27.Qxh5+ Qxh5 28.Nxh5 Rh8 29.g4 Nb8 30.Ba8 Ree8+/- ) 27...Rh8+/- ]
27.Nh5!+- Nc5?! [27...Rg8 28.Rg3 Qh4 29.Rg4! Qxh5 30.Rxg7+ Kxg7 31.Qxh5+- is perhaps more double edged, although White is clearly winning]
28.Nxc5 Bxc5 29.Rg3 Qh4 30.Rxg7+ Kf8 31.Rg6 Rf7 32.g3 Qh3 33.Nxf6 h5 34.Qg2 [the queen trade is fine, but Black is so paralyzed it's better to play waiting moves, i.e. 34.Rf3 Re7 35.Qd2 Rf7 36.Nh7+! Rfxh7 37.Qg5 and mate is inevitable]
34...Qxg2+ 35.Kxg2 Ke7 36.Rg8?! [>=36.Ng8+ Kf8 37.Nh6+- ]
36...Rxg8+/- 37.Nxg8+ Kf8 38.Nh6 Rh7 [I observed this part of the game and preferred another continuation 38...Rf6 39.Ra1 Kg7 40.Ra8+- Rf8 41.h4 Be3 42.g4 Kxh6 43.Kf3 Bd4 44.Bd7 hxg4+ 45.Kxg4 Rg8+ 46.Kh3 Rg1 47.Rxc8 Rh1++- and Black maybe has a prayer due to opposite colored bishops]
39.Ra1+- Kg7 40.Ng8 Bxf5 41.exf5 Kxg8 42.Ra8+ Kg7 43.Bd7 Kf6 44.Be6 Rg7? [44...e4 45.Rg8 Rh6 46.Kf1+/- ]
45.h3 [45.Rf8+ Ke7 46.Rh8 e4+- ]
45...Ke7 [>=45...e4 46.Rf8+ Ke7+/- ]
46.Rh8 Rg5? [46...e4 47.Rxh5 Bd4+- ]
47.h4?! [47.Rh7+ Kd8 48.f6 Ke8 49.Rh8+ Rg8 50.Rxg8# ]
47...Rg4 [47...Rg7 48.Rh6 Ke8 49.Rxh5 e4+- ]
48.Rh7+ Kf6 49.Rh6+? [49.Rf7# ]
49...Kg7+- 50.Rxh5 Rxc4 51.Rg5+ Kh6 52.Rg6+ Kh7 53.h5 Rc2+ 54.Kh3 Rc1 55.f6 Rh1+ 56.Kg4 Be3 57.f7 Bh6 58.Rg8 Rf1 59.Bf5+ Rxf5 60.Kxf5 1-0