Author: Martin Andersen2
Date: 12:43:30 01/27/06
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} 7.b3 {(b2b3 c4xb3 a2xb3 Nb8d7 Na3c4 Qd5h5
d2d4
Nf6e4 Qd1d3 f7f5 Kg1h1 g7g5 Bc1e3 Bf8g7) +0.41/13 18} cxb3 {(c4xb3 a2xb3 Qd5h5
Na3c4
Nb8d7 Ra1a5 c6c5 Bc1b2) -0.24/11 15} 8.axb3 {(a2xb3 Nb8d7 Na3c4 Qd5h5 Ra1a5 e7e5
Nf3xe5 Bf8b4 f2f3 Bg4e6 g3g4 Qh5h4 Ne5xd7 Nf6xd7 Ra5a2) +0.17/13 32} Nbd7
{(Nb8d7
Na3c4) -0.32/12 37} 9.Nc4 {(Na3c4 Qd5h5 Ra1a5 Nf6d5 e2e4 b7b6 Ra5a1 b6b5 e4xd5
b5xc4
h2h3 Bg4xh3 Bg2xh3 Qh5xh3 d5xc6) +0.15/13 15} Qh5 {(Qd5h5 Ra1a5 c6c5 Nc4e3 e7e6
Ne3xg4 Qh5xg4 Bc1b2) -0.46/12 42} 10.Ra5 {(Ra1a5 Nf6d5 e2e4 b7b6 Ra5a1 Nd5f6
d2d3 b6b5
Nc4e3 a7a5 Bc1d2 Nd7e5 Ne3xg4 Nf6xg4) +0.32/13 16} c5 {(c6c5 Nc4e3 e7e6 Ne3xg4
Qh5xg4
Ra5a4 Qg4h5) -0.47/12 13} 11.Bb2 {(Bc1b2 e7e6 Bb2xf6 g7xf6 Rf1e1 b7b6 Ra5a6 b6b5
Nf3h4 Ra8d8 Nc4e3 Nd7e5 Ne3xg4 Qh5xg4 Ra6xa7) +0.60/12 22} b6 {(b7b6 Ra5a6 Nd7b8
Ra6a1 Nb8d7 Nc4e3 a7a5 Ne3xg4) -0.64/11 33} 12.Ra6 {(Ra5a6 Nd7b8 Ra6a2 Nb8d7
Qd1c2
Bg4f5 d2d3 Nf6d5 Nf3g5 Nd5b4 Qc2d2 Nb4xa2 Bg2xa8) +0.79/13 31} Nb8 {(Nd7b8
Nc4xb6
Nb8xa6 Nb6xa8 Bg4d7 Qd1a1 Bd7b5 Qa1a5) -0.93/11 25} 13.Nxb6 {(Nc4xb6 Nb8xa6
Nb6xa8
Bg4d7 Qd1a1 Bd7b5 Qa1a5 Bb5xe2 Rf1e1 Be2xf3 Qa5xa6 e7e6 Na8c7+ Ke8d8 Bg2xf3
Qh5xf3
Bb2xf6+ g7xf6 Qa6xa7 Qf3xb3) +1.16/12 10} Nxa6 {(Nb8xa6 Nb6xa8 Nf6d5 Qd1a1)
-1.97/11
13} 14.Nxa8 {(Nb6xa8 Bg4d7 Qd1a1 Bd7b5 Na8c7+ Na6xc7 Qa1xa7 Qh5d5 Qa7xc7 Qd5d6
Qc7c8+ Qd6d8 Qc8xd8+ Ke8xd8 Nf3e5 Kd8e8 Ne5c4) +1.53/12 5} Bc8 {(Bg4c8 Qd1a1
Nf6d7
Qa1a4 f7f6 Rf1a1 c5c4 Qa4c6) -2.25/11 14} 15.Qa1 {(Qd1a1 Nf6d7 Qa1a4 f7f6 Qa4c6
Ke8d8
Bb2c3 c5c4 b3xc4 Qh5c5 Qc6e6 Kd8e8) +2.47/12 11} Nd7 {(Nf6d7 Qa1a4 f7f6 Qa4c6
Ke8d8
Bb2c3 c5c4 Nf3d4) -3.12/11 10} 16.Qa4 {(Qa1a4 f7f6 Qa4c6 Ke8d8 Bb2c3 c5c4 Nf3e5
e7e6
Bc3a5+ Kd8e7 Qc6xc8 Nd7xe5 Qc8xa6 c4xb3 Qa6xa7+ Ke7e8) +3.13/13 10} e6 {(e7e6
Nf3e5)
-3.75/12 40} 17.Ne5 {(Nf3e5 Na6b8 Na8c7+ Ke8e7 Bb2c3 a7a6 Ne5d3 Ke7d8 Nd3f4
Qh5f5 g3g4
Qf5c2 Bg2e4) +3.46/12 19} Nab8 {(Na6b8 Ne5xd7 Bc8xd7 Na8c7+ Ke8e7 Qa4xa7)
-4.20/11
24} 18.Nc7+ {(Na8c7+ Ke8e7 Bb2c3 a7a6 Ne5d3 Qh5g5 Nd3f4 Qg5h6 e2e3 Ke7d8 Qa4a5
Bf8d6) +3.55/11 13} Kd8 {(Ke8d8 g3g4 Qh5xe5 Bb2xe5 Nd7xe5 Nc7b5 Ne5d7 Qa4xa7)
-3.79/11
22} 19.g4 {(g3g4 Qh5xe5 Bb2xe5 Nd7xe5 Qa4xa7 Ne5d7 Qa7a5 Kd8e7 b3b4 c5xb4
Qa5xb4+
Ke7d8 Qb4f4 Bf8c5) +6.07/11 11} Qxe5 {(Qh5xe5 Bb2xe5 Nd7xe5 Qa4a5 Ne5c6 Nc7xe6+
Kd8e8
Bg2xc6+ Nb8xc6 Qa5c7 Bc8xe6 Qc7xc6+ Be6d7 Qc6a8+) -4.42/13 12} 20.Bxe5 {(Bb2xe5
Nd7xe5
Qa4xa7 Ne5d7 Qa7a5 Kd8e7 b3b4 Ke7f6 f2f4 Kf6g6 Bg2e4+ f7f5 Qa5a2 Nd7f6 g4xf5+
e6xf5)
+6.55/11 5} Nxe5 {(Nd7xe5 Qa4a5 Ne5c6 Nc7xe6+ Kd8e8 Bg2xc6+ Nb8xc6 Qa5c7 Bc8xe6
Qc7xc6+
Be6d7 Qc6a8+ Ke8e7 Qa8xa7) -4.42/13 10} 21.Qxa7 {(Qa4xa7 Ne5d7 Qa7a5 Kd8e7 b3b4
c5xb4
Qa5xb4+ Ke7d8 Qb4a5 Kd8e7 Rf1b1 h7h5 g4xh5 f7f6) +6.75/13 15} Ned7 {(Ne5d7 Nc7b5
Bc8a6
Qa7c7+ Kd8e7 Nb5a7 Ba6xe2 Na7c6+ Nb8xc6 Bg2xc6 Be2xg4 Qc7xd7+ Ke7f6 Qd7d8+)
-5.76/14
18} 22.b4 {(b3b4 c5c4 Qa7a5 Kd8e7 Rf1c1 g7g6 Rc1xc4 Bf8h6 d2d4 Rh8d8 b4b5 Nd7f6
Qa5a3+ Rd8d6) +6.90/14 16} c4 {(c5c4 Rf1c1 Bf8d6 Rc1xc4 Kd8e7 Bg2b7 Bc8xb7
Qa7xb7
h7h5) -4.63/11 7} 23.Qa5 {(Qa7a5 Bf8d6 Nc7xe6+ Kd8e7 Ne6xg7 Nd7e5 Qa5a7+ Ke7f8
Qa7d4
Kf8xg7 Qd4xd6 Nb8d7 g4g5 h7h6 f2f4) +7.91/13 8} Bd6 {(Bf8d6 Nc7xe6+ Kd8e7
Ne6xg7)
-5.77/12 20} 24.Nxe6+ {(Nc7xe6+ Kd8e7 Ne6xg7 Nd7e5 f2f4 Ne5g6 Ng7f5+ Bc8xf5
Qa5xf5 Nb8d7
Qf5e4+ Ke7d8 Qe4xc4 Rh8e8 e2e3 Kd8e7 Rf1a1) +8.68/13 13} Ke7 {(Kd8e7 Ne6xg7
Nd7e5 f2f4
Ne5c6 Qa5g5+ Ke7d7 Bg2xc6+ Nb8xc6 Qg5d5 Nc6e7 Qd5xc4) -5.77/12 2} 25.Nxg7
{(Ne6xg7
Nd7e5 f2f4 Ne5c6 Qa5g5+ Ke7d7 Rf1c1 Nc6xb4 Rc1xc4 Bc8a6 Qg5f5+ Kd7e7 Rc4e4+
Ke7d8
Qf5xf7 Kd8c8) +8.92/13 11} Ne5 {(Nd7e5 f2f4 Ne5c6 Qa5g5+ Ke7d7 Bg2xc6+) -6.55/12
21}
26.f4 {(f2f4 Ne5xg4 Qa5g5+ Ng4f6 Rf1f3 Rh8g8 Rf3e3+ Bc8e6 f4f5 h7h6 Qg5xh6 Nf6g4
Qh6h4+ Ke7f8 Ng7xe6+ f7xe6 Re3xe6 Bd6xh2+ Kg1h1) +8.87/12 12} Nec6 {(Ne5c6
Qa5g5+
Ke7d7 Bg2xc6+ Nb8xc6 Qg5d5 Rh8g8 Qd5xf7+) -8.04/12 48} 27.Qg5+ {(Qa5g5+ Ke7d7
Rf1c1
c4c3 Rc1xc3 Nc6d4 Rc3d3 Nd4xe2+ Kg1f1 Bc8a6 Qg5f5+ Kd7e7 Rd3e3+ Ke7d8 Qf5f6+
Kd8c7
Qf6xf7+ Kc7b6 Re3xe2 Ba6xe2+ Kf1xe2 Bd6xb4) +9.79/12 14} Kd7 {(Ke7d7 Bg2xc6+
Nb8xc6
Qg5d5 Rh8g8 Qd5xf7+ Nc6e7 f4f5 Bc8b7 f5f6 Bb7d5) -8.04/11 2} 28.Rc1 {(Rf1c1 c4c3
Rc1xc3 Nc6d4 Rc3d3 Nd4xe2+ Kg1f1 Bc8a6 Qg5f5+ Kd7e7 Rd3e3+ Ke7d8 Qf5f6+ Kd8c7
Qf6xf7+
Kc7b6 Re3xe2 Ba6xe2+ Kf1xe2 Bd6xb4) +9.79/12 12} c3 {(c4c3 Rc1xc3 Nc6d4 Rc3d3
Nd4xe2+
Kg1f1 Bc8a6) -8.40/9 10} 29.Rxc3 {(Rc1xc3 Nc6d4 Rc3d3 Nd4xe2+ Kg1f1 Bc8a6 Qg5f5+
Kd7e7 b4b5 Ne2xf4 Qf5g5+ Ke7f8 Rd3xd6) +10.64/11 11} Nd4 {(Nc6d4 Rc3d3 Nd4c6
Bg2xc6+)
-12.66/10 50} 30.Rd3 {(Rc3d3 Nd4xe2+ Kg1f1 Bc8a6 Rd3xd6+ Kd7xd6 Ng7f5+ Kd6c7
Qg5e7+ Nb8d7
Qe7d6+ Kc7d8 Qd6xa6 Ne2xf4 Qa6a8+ Kd8c7 Qa8xh8) +12.69/11 11} Ndc6 {(Nd4c6 Qg5d5
Bc8b7
Qd5xf7+ Kd7c8 Rd3xd6 h7h5 g4xh5) -17.19/10 25} 31.Qd5 {(Qg5d5 Bc8b7 Qd5xf7+
Kd7c8
Qf7e6+ Nb8d7 Qe6xd6 Nd7c5 b4xc5 Rh8d8 Qd6e6+ Kc8b8 Bg2xc6 Rd8xd3 e2xd3 Bb7xc6
Qe6xc6)
+19.00/11 11} Bb7 {(Bc8b7 Qd5xf7+ Kd7c8 Rd3xd6 Rh8d8 Ng7e6 Nb8d7 Ne6xd8 Nc6e7)
-M90/11
10} {1-0 Arena Adjudication} 1-0
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