DE 5th Webserver Anniversary prel.

Balasubramanian,Ramesh (1739) USA - Baranowski,Tadeusz (2443) POL

DE 5th Webserver Anniversary prel. 50, 05.04.2011

D45: Obrona półsłowiańska: 5. e3
1.d4 Sf6 2.Sf3 e6 3.c4 d5 4.Sc3 c6 5.e3 Sbd7 6.Hc2 Gd6 7.g4 h6 8.Gd2 dxc4 9.Gxc4 b5 10.Ge2 Gb7 11.e4 Ge7 12.g5 hxg5 13.Sxg5 b4 14.Sa4 c5 [14...Wc8 15.e5 Sd5 16.Sxe6 fxe6 17.Hg6+ Kf8 18.Wg1 Gf6 19.exf6 Hxf6 20.Hg3 e5 21.dxe5 Hxe5 22.Sc5 Hxg3 23.Sxd7+ Ke8 24.Wxg3 Jankovic,A - Sriram,J Kavala 2006; 14...Hc7 15.e5 Sd5 16.Wg1 Gxg5 17.Gxg5 Wxh2 18.Gg4 c5 19.Wc1 Kf8 20.Sxc5 Sxc5 21.Hxc5+ Hxc5 22.Wxc5 Wc8 23.Ge2 f6 24.exf6 Nyback,T - Jaracz,P Dresden 2007]

15.Sxc5 [15.dxc5 Wh4 16.f3 (16.Wg1 Gc6 17.0-0-0 Ha5 18.b3 Wc8 19.Kb1 Sxc5 20.Sxc5 Hxc5 21.Gd3 Hxc2+ 22.Gxc2 Wxh2 23.Wh1 Wxh1 24.Wxh1 Gc5 Rogetzer,K - Schmidt,T ws 2008; 16.f4 Wc8 17.Hd3 Sxc5 18.Sxc5 Gxc5 19.Hb5+ Hd7 20.Hxd7+ Sxd7 21.Gd3 Gd6 22.0-0 Wg4+ 23.Kh1 Sc5 24.Gb5+ Ke7 Aloma Vidal,R - Savchenko,S Palma de Mallorca 2009; 16.c6 Wc8 17.cxd7+ Sxd7 18.Sxe6 fxe6 19.Hb3 Wxe4 20.Wg1 Ha5 21.Kf1 Wxe2 22.Kxe2 Se5 23.Wg3 Hb5+ 24.Ke1 Ga6 0-1 Miedema,R - Giri,A Haaksbergen 2009) 16...Wc8 (16...Gc6 17.a3 b3 (17...Hb8 18.axb4 Wxh2 19.Wxh2 Hxh2 20.Gf1 Hg3+ 21.Kd1 Sxe4 22.fxe4 Se5 23.Kc1 Hg1 24.Hd1 Gxg5 Kazantsev,RA - Shulman,BY ws 2008) 18.Hxb3 Wb8 19.Hc4 Se5 20.Hc2 Sh5 21.Sxe6 fxe6 22.0-0-0 Hc7 23.b4 Sf4 24.Gxf4 Wxf4 Rawlings,AJC - Saule,Z ws 2008) 17.Hb3 Hc7 18.Hxb4 Gc6 19.Sc3 Wb8 20.Hc4 Sxc5 21.Hd4 Sh5 22.Wb1 Wd8 23.Hf2 Sf4 24.Hg1 Sxe2 Ruggieri,O - Legemaat,G ws 2010]

15...Sxc5 16.dxc5 Wc8 DIAGRAM17.Gxb4 [17.Ha4+ Gc6 18.Gb5 Gxb5 19.Hxb5+ Hd7 20.Hxd7+ Sxd7 21.Ke2 Wh4 22.Wac1 Wxc5 23.Wxc5 Gxc5 24.f4 e5 25.h3 exf4 26.Sf3 Wh6 Carlsen,M - Aronian,L Linares 2009] 17...Sd7 czy piona na c5 można obronić?. czarne grożą zdobyciem materiału: Sd7xc5

18.Gb5 0-0 [18...Gc6 19.Gxc6 Wxc6 20.Sf3 Gxc5 21.Gxc5 Wxc5 22.He2 Hf6 23.Wd1 Wh3 24.Hd2 Wc7 25.Sd4 Sc5 26.Hb4 Sd3+ 27.Wxd3 Wxd3 28.Hb5+ Le Bled,P - Laane,E ws 2007;
  18...Gxg5 19.c6 Gxc6 20.Gxc6 Hc7 21.Gxd7+ Hxd7 22.Gc3 (22.He2 Gf6 23.0-0 Wb8 24.Wfd1 Gd4 25.Gc3 Hc7 26.e5 Gxc3 1/2-1/2 Badolati,S - Schmidt,T ws 2007) 22...Gf6 23.Wd1 Hc6 24.0-0 Gxc3 25.Hxc3 Soza de la Carrera,J - Moreno Carretero,C ws 2007]

19.Gxd7 Hxd7 czarne mają parę gońców i powstrzymują 0-0-0 20.Wg1 Hb5 [20...Wfd8 21.Wd1 (21.Sf3=/+ ) 21...Hb5 22.Gc3 Hc4 23.Sxf7 Kxf7 24.Wxg7+ Kf8 25.Wg4 Hxc5 26.Wd5 Hc4 1/2-1/2 Shaw,S - Elent,M ws 2008] 21.Gc3= Wxc5 22.Sxe6 Wxc3 23.Wxg7+ Kh8 24.bxc3 Ga6 milczace przerwanie gry [24...Ga6 25.c4 Hb4+ 26.Hd2 fxe6 27.Wxe7 Hxe7 28.Hh6+ Kg8 29.Hg6+ Hg7 30.Hxe6+ Kh7 31.Hh3+ Hh6 32.Hxh6+ Kxh6= ; 24...fxe6? może i wygląda kusząco, ale może prowadzić do kłopotów 25.Wxe7 Hg5 26.Wxb7 Hg1+ 27.Kd2 Hxa1 28.Wb1 Wxf2+ 29.Kd3 Wxc2 30.Wxa1 Wxh2 31.c4+- ] 0-1  Tabela