Vvarkey,Rybka 1.1 - Klosterfrau

CSS/Pal Freestyle Final (45+5) round 4

[comments by IM I. Radziewicz]

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 d6 5.0–0 Bd7 6.c3 g6 7.Nbd2 Bg7 8.Re1 0–0 9.Nf1 Nh5 It does not look that this variation promise white an advantage.

WHITE TO PLAY

10.Ba4 Kh8 11.Bg5 [11.d4!? e:d4 12.N:d4 with more less equal position] 11...f6 12.Be3 f5 black is slightly better 13.e:f5 g:f5 14.Bg5 Qe8 15.Ng3 Qg6! Hoping for Bc6?

WHITE TO PLAY

16.B:c6? Until depth 15 Rybka consider this move as the best alternative for white. Other way for white was to play:

16.Qd2!? but then black can play 16… f4 17.Ne4 h6 18.Be7 Rg8 with attack, or…

16.Bc1 Ply 16! White idea is to play d4 and fight for equality, but black can then play 16...f4! Closing Bishop c1. Now white would have 3 choices:

a)    17.N:h5 Q:h5 18.d4 Bg4 19.d5 Ne7 20.Bc2;

b)   17.Ne4 d5 18.Nc5 Bh3 19.Nh4 Qg5 20.g3 (20.N:b7 Nd8 21.N:d8 Ra:d8 with attack) 20...Rf6 with attack;

c)    17.Nh4 17...Qg4 18.N:h5 (18.Q:g4 B:g4 19.Ne4 Nf6 with better endgame) 18...Q:h4 19.N:g7 K:g7 =+

Back to the game: 16...B:c6 with better position for black 17.Be7

BLACK TO MOVE

17…Nf4! White has very weak white squares 18.Nh4 Qf7 19.B:f8 R:f8 with much more than compensation for black! 20.Nf3 Rybka "thinks" that white remain balance... [20.Ng:f5? N:g2–+] 20...Bf6 21.b4 h5 Black develops an attack 22.h4 Qg6 23.a4 b6! to keep bishop on the long diagonal 24.b5 Bb7 25.a5 Engine is not able to “feel” the danger... yet.

BLACK TO MOVE

25...N:g2! –+ 26.K:g2 f4 27.Re4 f:g3 28.f:g3 B:e4 29.d:e4 Q:e4 Black is a pawn up with better position and Vvarkey Rybka 1.1 had to give up after next 20 moves when reached score –10 for black.

WHITE TO MOVE

30.a:b6 a:b6 31.Ra7 Rg8 32.Qd2 Rg6 33.Qa2 Rg7 34.Ra4 Qg6 35.Qf2 Kh7 36.Ng1 d5 37.Kh2 e4 38.Nh3 Qg4 39.Ra2 Be5 40.Ng5+ Kg6 41.Kg2 Bf6 42.Ra8 B:g5 43.h:g5 Qf5 44.Rf8 Q:f2+ 45.K:f2 Rf7+ 46.R:f7 K:f7 47.Ke3 Kg7 48.c4 d:c4 0–1