Author: Günther Simon
Date: 12:54:14 01/27/06
Go up one level in this thread
On January 27, 2006 at 15:43:30, Martin Andersen2 wrote:
>I came across this game while testing Rybka 1.01 beta 13 against
>Toga II, with Wael Deeb opening book for Rybka. (10 minutes/player, ponder off)
>
>[D] r3kb1r/pp1npppp/5n2/R1p4q/2N3b1/1P3NP1/1B1PPPBP/3Q1RK1 b kq - 1 11
>
>Only 11 moves and black (Rybka) seems to be in trouble, at least Rybka
>must play accurately.
>
>[D] r3kb1r/p2npppp/Rp3n2/2p4q/2N3b1/1P3NP1/1B1PPPBP/3Q1RK1 b kq - 1 12
>
>2 plies later and black is doomed, the evaluation is dropping. Even at a
>deeper analysis Rybka evaluates the position as -1.59 with rook d8.
>In the game Rybka played Knight b8..
>
>[D] N3kb1r/p3pppp/n4n2/2p4q/6b1/1P3NP1/1B1PPPBP/3Q1RK1 b k - 0 14
>
>A few moves later the bishop retreats to c8:
>
>[D] N1b1kb1r/p3pppp/n4n2/2p4q/8/1P3NP1/1B1PPPBP/3Q1RK1 w k - 1 15
>
>[D] 1nbk1b1r/p1Nn1ppp/4p3/2p1N2q/Q5P1/1P6/1B1PPPBP/5RK1 b - - 0 19
>
>And here black's best move is Queen take e5, and naturally it's lost.
>
>What went wrong for Rybka ?
>
>The game:
>
>[Event "Arena tournament"]
>[Site "PC_01"]
>[Date "2006.01.27"]
>[Round "55"]
>[White "TogaII"]
>[Black "Rybka v1.01 Beta 13.w32"]
>[Result "1-0"]
>[ECO "A11"]
>[Opening "English"]
>[Time "16:52:03"]
>[Variation "Caro-Kann Defence, 2.g3 Nf6 3.Bg2 d5 4.Nf3 Bg4 5.O-O"]
>[TimeControl "600"]
>[Termination "normal"]
>[PlyCount "62"]
>[WhiteType "program"]
>[BlackType "program"]
>
>1.Nf3 Nf6 2.g3 d5 3.Bg2 c6 4.O-O Bg4 5.c4 dxc4 {(d5xc4 Nf3e5 Bg4e6 d2d3 c4xd3
>Ne5xd3 Nb8d7 Nb1c3) -0.15/11 16} 6.Na3 {(Nb1a3 Qd8d5 b2b3 c4xb3 a2xb3 Nb8d7
>Na3c4
>Qd5h5 d2d4 Nf6e4 Qd1d3 Nd7f6 Kg1h1 g7g5) +0.40/13 19} Qd5 {(Qd8d5 Qd1c2 b7b5
>b2b3
>Qd5d6 b3xc4 b5b4 c4c5) -0.22/11 14}
Giving up the centre here with 5...dxc4? is bad and the attempt to keep
it with Qd5?(typical computer move) makes things even worse.
Black never recovers from that...
Guenther
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