Masterclass 2008 door Sosonko

(1) Westerop,S - Rakhorst,W [A06] NHSB Promotieklasse 6/7 Amsterdam, 21.04.2007 [Fritz 8 (15s)] A06: Reti Opening:1 Nf3 d5 1.Pg1-f3 d7-d5 2.e2-e3 Pg8-f6 3.b2-b3 e7-e6 4.Lc1-b2 Lf8-d6 5.g2-g4 [ 5.g2-g3 c7-c5 6.c2-c4 Pb8-c6 7.a2-a3 0-0 8.d2-d3 d5xc4 9.b3xc4 e6-e5 10.Dd1-c2 Ld6-c7 11.Pb1-d2 Dd8-d6 12.Lf1-e2 Lc8-f5 13.0-0 Ta8-d8 14.Pd2-e4 Pf6xe4 15.d3xe4 Lf5-e6 16.Lb2-c3 Lc7-a5 17.Tf1-d1 Dd6-c7 18.Lc3-b2 Td8xd1+ 19.Ta1xd1 f7-f6 Habibi,A-Luther,T/Lenk 1999/EXT 2000/0-1 (42)] 5...0-0N [ 5...h7-h6 6.Th1-g1 Dd8-e7 7.c2-c4 e6-e5 8.c4xd5 Pf6xd5 9.d2-d3 Pb8-c6 10.Pb1-d2 Lc8-e6 11.a2-a3 De7-d7 12.h2-h3 f7-f6 13.b3-b4 a7-a6 14.Pd2-e4 h6-h5 15.g4xh5 Le6xh3 16.Lf1xh3 Dd7xh3 1/2-1/2 Fries Nielsen,J-Kuczynski,R/Germany 2004/CBM 105 (16)] 6.g4-g5 Pf6-d7 7.Pb1-c3 c7-c6 Beheerst b5 8.h2-h4 e6-e5 9.Lf1-h3 Pd7-b6 10.Pc3-e2 [ 10.d2-d3!?=/+ Vraagt om nadere analyse.] 10...Lc8xh3-/+ 11.Th1xh3 Pb8-d7 12.Pe2-g3 Dd8-e7 13.Th3-h1 [ 13.e3-e4 d5xe4 14.Pg3xe4 Pb6-d5=/+ ] 13...De7-e6 [ 13...f7-f5 14.g5-g6 h7-h6 15.Pg3-e2-/+ ] 14.h4-h5 Pb6-c8 [ 14...f7-f5 15.Pg3-e2-/+ ] 15.Pf3-h4 Pc8-e7 16.Dd1-e2 a7-a5 17.a2-a4 f7-f5 zwart bereidt zich voor op het voordeel van e4. 18.f2-f4 e5-e4 19.h5-h6 g7-g6 Controleert h5 20.Ke1-f2 [ 20.Ph4-g2 Tf8-b8-/+ ] 20...Tf8-b8 21.d2-d3 c6-c5 [ 21...Tb8-f8!?-/+ ] 22.d3xe4 f5xe4 23.c2-c4 d5-d4 [ 23...Tb8-f8 24.c4xd5 Pe7xd5 25.Ph4-g2=/+ ] 24.e3xd4 Ld6xf4 [ >=24...Tb8-f8 Ziet er nog speelbaar uit. 25.Ph4-g2 Ld6xf4 26.Pg3xe4 Lf4-e5+ 27.Kf2-g1 c5xd4=/+ ] 25.Pg3xe4+- De6-f7 [ 25...Tb8-f8 26.Pe4-f6+ Tf8xf6 27.g5xf6 De6xf6 28.Ph4-f3+/- ] 26.Kf2-g2 [ 26.d4xc5!? Tb8-f8 27.Ta1-d1 Pe7-f5 28.Ph4xf5 Ta8-e8+- ] 26...Pe7-f5+/- 27.Ph4xf5 g6xf5 [ 27...Df7xf5 28.Ta1-e1 Tb8-f8 29.Th1-f1+/= ] 28.Pe4xc5 Pd7xc5 29.d4xc5 Tb8-e8 30.De2-f2 [ 30.De2-f3!? Te8-e4 31.Th1-h4 Lf4xg5 32.Th4xe4 f5xe4 33.Df3xe4+/- ] 30...Lf4-e3 31.Df2-f3 Ta8-d8 32.Ta1-d1 Le3xg5 33.Td1xd8 Te8xd8 34.Th1-d1 [ >=34.Lb2-c3!? Df7-g6 35.Th1-h3+/- ] 34...Td8xd1+/= 35.Df3xd1 Df7-e6? [ >=35...Lg5xh6!? Komt in aanmerking. 36.Lb2-c3 Lh6-f8+/= ] 36.Dd1-d5+- De6xd5+ [ 36...Kg8-f7 37.Lb2-c3 Lg5-e7+- ] 37.c4xd5 Lg5xh6 [ 37...Kg8-f7 38.Kg2-f3+- ] 38.Lb2-c3 Lh6-e3 [ 38...Kg8-f7 39.Lc3xa5 Kf7-e7+- ] 39.c5-c6 b7xc6 40.d5xc6 Le3-b6 [ 40...Le3-f4 41.Lc3xa5 Kg8-f7 42.c6-c7 Lf4xc7 43.La5xc7+- ] 41.Lc3-e5 [ >=41.Lc3xa5 Maakt de winst nog eenvoudiger. 41...Lb6xa5 42.b3-b4 La5-d8+- ] 41...Kg8-f7 42.c6-c7 Lb6xc7 43.Le5xc7 [ 43.Le5xc7 Kf7-e6 44.Lc7xa5+- ] 1-0

(2) Lieverts,P - Poncin,P [C00] NHSB Beker Amsterdam (1), 23.10.2007 1.e2-e4 e7-e6 2.f2-f4 c7-c5 3.Pg1-f3 d7-d5 4.e4-e5 Pb8-c6 5.c2-c3 Lc8-d7 6.d2-d3 h7-h5 7.Lf1-e2 Pg8-h6 8.0-0 Ph6-f5 9.Pb1-a3 Lf8-e7 10.Pa3-c2 Dd8-c7 11.Pc2-e3 g7-g6 12.Pe3xf5 g6xf5 13.Lc1-e3 0-0-0 14.d3-d4 c5xd4 15.c3xd4 Td8-g8 16.a2-a3 Kc8-b8 17.b2-b4 Dc7-b6 18.Ta1-c1 a7-a6 19.Pf3-e1 f7-f6 20.Dd1-d2 f6xe5 21.d4xe5 Db6-d8 22.Pe1-c2 Dd8-f8 23.Pc2-d4 Pc6-a7 24.Pd4xe6 Ld7xe6 25.Dd2-d4 Pa7-c8 26.Tc1xc8+ Kb8xc8 27.Tf1-c1+ Kc8-d7 28.Dd4-b6 Le7-d6 29.e5xd6 Df8xd6 30.Db6xb7+ Kd7-e8 31.Le2xa6 Le6-d7 32.Tc1-e1 Th8-h7 33.Le3-c5+ 1-0

(3) Sosonko,G (2515) - Van der Sterren,P (2535) [D21] NED-ch NED (9), 1996 [Ftacnik] 1.d2-d4 d7-d5 2.Pg1-f3 e7-e6 3.c2-c4 d5xc4 4.Pb1-c3 a7-a6 5.e2-e4 b7-b5 6.a2-a4 [ 6.e4-e5 Lc8-b7 7.Lf1-e2 Pg8-e7 8.Pf3-g5 Pe7-f5 9.Le2-h5 g7-g6 10.Lh5-f3 Pb8-c6 11.Pg5-e4 Lf8-e7 12.Lc1-e3 Pc6xd4 13.Pe4-d6+ c7xd6 14.Lf3xb7 d6xe5 15.Lb7xa8 Dd8xa8 16.0-0 0-0 17.Dd1-b1 b5-b4 18.Pc3-e4 Tf8-c8 0-1 Bach,Ma-Mueller,Ka/Hamburg op (04)/1992/ (27)] 6...b5-b4 7.Pc3-e2 [ 7.Pc3-b1 Lc8-b7 8.Dd1-c2 ( 8.e4-e5 c7-c5 9.Lf1xc4 Pb8-c6 10.Lc1-g5 Lf8-e7 11.Lg5xe7 Pg8xe7 12.d4xc5 Dd8-c7 13.Dd1-d6 Dc7-a5 14.Pb1-d2 Pe7-f5 Black seems to be able to avert the greatest danger. 15.Dd6-d3 Da5xc5 16.Pd2-e4 Dc5-a5 17.Pe4-d6+ Pf5xd6 18.e5xd6 Pc6-e5 19.Pf3xe5 Da5xe5+ 20.Ke1-f1 0-0 Koerholz,L-Varga,Zo/Budapest FS04 GM (09)/1993/1/2-1/2 (60)) 8...Pg8-f6 9.e4-e5 Lb7xf3 10.g2xf3 Pf6-d5 11.Lf1xc4 c7-c5 12.d4xc5 Pb8-c6 13.Dc2-e4 Lf8xc5 14.Lc1-e3 Lc5xe3 15.f2xe3 Dd8-b6 16.Ke1-e2 0-0 17.Pb1-d2 f7-f5 18.e5xf6 Pd5xf6 19.a4-a5 Db6-c7 20.Lc4xe6+ Kg8-h8 21.De4-c4 Dc7-d6 Schulte,O-Sadler,M/Oakham/1988/0-1 (59)] 7...c7-c5! [ 7...Lc8-b7 8.Pe2-g3 c7-c5 9.Lf1xc4 c5xd4 10.Pf3xd4 Pg8-f6 11.e4-e5 Dd8-c7 12.Dd1-e2 Pf6-d7 13.f2-f4 Lf8-c5 14.Lc1-e3 Pb8-c6 15.Ta1-d1 Pc6xd4 16.Le3xd4 0-0 17.0-0 Pd7-b6 18.Lc4-b3 Lc5xd4+ 19.Td1xd4 Tf8-d8 20.Td4xd8+ Ta8xd8 21.f4-f5 Lb7-d5 1/2-1/2 Jajonek,R-Donchenko,A/Duesseldorf (04)/1995/ (30)] 8.d4-d5 [ 8.Pe2-g3 c5xd4 9.Lf1xc4 Pb8-c6 ] 8...e6xd5 9.Pe2-f4 Pg8-e7 [ 9...d5xe4 10.Dd1xd8+ Ke8xd8 11.Pf3-g5 Pg8-h6 12.Lf1xc4 f7-f5 13.Lc1-e3|^ ; 9...d5-d4 10.Lf1xc4 Ta8-a7 11.0-0© ] 10.e4xd5 Pe7-g6 11.Lf1xc4 Lf8-d6 12.Pf4xg6 [ 12.Dd1-e2+ Ke8-f8 ] 12...h7xg6 13.0-0 Pb8-d7 14.Dd1-e2+ [ 14.Tf1-e1+ Ke8-f8 15.h2-h3 Pd7-f6 16.Lc1-g5 Ta8-a7 ] 14...Ke8-f8 15.h2-h3 Th8-h5 16.a4-a5 [ 16.Lc1-e3 Pd7-b6 17.Tf1-d1 Lc8-b7= ] 16...Pd7-f6 [ 16...Dd8-f6 17.Lc1-e3 Pd7-e5 18.Pf3xe5 Df6xe5 19.f2-f4+/= ] 17.Lc1-g5? White underestimates the danger of black pieces aiming towards his king. [ 17.Tf1-e1 Ta8-a7 ( 17...Lc8xh3 18.g2xh3 Dd8-d7 19.Pf3-g5+- ) 18.Lc1-g5 Ta7-e7 19.De2-d2= ] 17...Lc8xh3! 18.Lg5-h4 [ 18.g2xh3 Dd8-d7 19.h3-h4 Dd7-g4+ 20.Kg1-h1 Dg4-h3+ 21.Kh1-g1 Pf6-g4 22.Ta1-d1 Ld6-h2+ 23.Kg1-h1 Lh2-f4+ 24.Kh1-g1 Lf4xg5-+ ] 18...Dd8-d7 19.Lh4-g3 [ 19.g2xh3 Dd7xh3 20.Tf1-e1 Th5xh4-+ ] 19...Lh3xg2! The king's shelter has to be destroyed, black will then be ready to deliver the final blow. 20.Lg3xd6+ Kf8-g8! [ 20...Dd7xd6 21.Kg1xg2 Dd6-d7 22.Pf3-g1 Th5-g5+=/+ ; 20...Kf8-g8! 21.Ld6-h2 Dd7-h3 22.De2-e5 Lg2xf3 23.De5-g3 Th5-g5 24.Dg3xg5 Pf6-g4-+ ] 0-1