I've carefully read most of the commentary that went on in the last week and am now surprised that
Ostap played 13.g4 after all the productive work that went on with 13.Rhf1.
Now that 13.g4 is on the board, it seems that Black has only two main options:
- 13...Bb7
and - 13...Nb6
- 13...Another move. Again, please explain.
As far as I'm concerned, 13...f6 has been busted in analysis. My own analysis follows what's been published, but I think it bears repeating:
Nijboer,F (2553) - Glek,I (2576) [C11]
FRA-chT France (2.1), 01.02.2003
[and,Dan]
1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5 Nfd7 5.f4 c5 6.Nf3 Nc6 7.Be3 cxd4 8.Nxd4 Bc5 9.Qd2 0-0 10.0-0-0 a6 11.Nb3 Bb4 12.Bd3 b5 13.g4 [13.Rhf1 Nb6 14.Bc5 Bxc5 15.Nxc5 Nc4 16.Qf2 Qb6?! (16...Qe7!?) 17.g4 d4 18.N3e4 Ne3 19.Nf6+ gxf6 20.Qh4] 13...Bb7
[13...f6 14.a3 Bxc3 15.Qxc3 Bb7 16.exf6 Qxf6 17.Qxf6 Nxf6 18.Rhg1 e5 19.Nc5 and Black is dead.] 14.Rhg1
[14.Rhf1 Rc8 15.f5 (15.Qg2 Bxc3 16.bxc3 f6 (16...Ncxe5?? 17.fxe5 Nxe5 18.Bd4) 17.Qh3 g6 18.f5 Ndxe5 19.Nc5 Nxd3+ 20.cxd3 (20.Rxd3? Ne5) 20...Qa5 21.fxg6 Qxc3+ 22.Kb1 hxg6 23.Qh6 Qb4+ 24.Ka1=; 15...Ncxe5 16.fxe6 fxe6 17.Rxf8+ Qxf8 18.Rf1 Qd6 19.Bd4 Nxd3+ 20.Qxd3 e5 21.Bf2 Bxc3 22.bxc3 Nf6 23.Qf5 Ne4 24.Bg3 Nxg3 25.hxg3 Rf8] I need to invest some time in this analysis because I know this isn't best play for either side.
14...Rc8 [14...f6] 15.Rg3 Re8 16.Rh3 g6 17.Qf2 Bf8 18.g5 Nb4 19.Kb1 Nxd3 20.cxd3 Bc6 21.Ne2 b4 22.Nbd4 Ba4 23.b3 Bb5 24.Nxb5 axb5 25.Nd4 Qa5 26.Qh4 h5 27.gxh6 Rc3 28.h7+ Kh8 29.Qf2 Ra8 30.Qb2 Nc5 31.Bf2 Rc8 32.Bh4 Nd7 33.Be1 Qb6 34.Nf3 Be7 35.d4 1-0
I'm leaning toward 13...Bb7 for several reasons, the most prominent being that it seems the most flexible move for Black. What do you all think?