Here is a position, where computers make an inferior choice.

Discussion of anything and everything relating to chess playing software and machines.

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Dann Corbit
Posts: 12542
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Here is a position, where computers make an inferior choice.

Post by Dann Corbit »

From this position:
[D]r1b2rk1/pp1nqpp1/2p4p/4p3/2BP4/2R1PN2/PP3PPP/3Q1RK1 w - - id "NNSSL.021"; pm Qc2 d5; c0 "Actually, Qc2 is doubtful.";

Both Hiarcs and Rybka seemed to like the choice Qc2. It does not seem to play out very well. It scores 37% and there are no wins for white after Qc2 in the very strong opponent database. There are not a lot of games between top opposition for this position, so perhaps it is just an anomaly.

Code: Select all

{
In this position, white fares poorly.
[D]r1b2rk1/pp1nqpp1/2p4p/4p3/2BP4/2R1PN2/PPQ2PPP/5RK1 b KQkq - 0 1
}

[Event "SedatChess"]
[Site "?"]
[Date "2005.06.07"]
[Round "2.13"]
[White "Ruffian 2.1.0"]
[Black "Glaurung 0.2.3"]
[Result "1/2-1/2"]
[ECO "D53h"]
[Opening "QGD"]
[Variation "Neo-orthodox accelerated (5.Bg5 h6) variation"]
[Source "Sedat"]

1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 h6 6.Bh4 Nbd7 7.e3 Ne4 8.Bxe7 
Qxe7 9.Rc1 Nxc3 10.Rxc3 c6 11.Bd3 O-O 12.O-O dxc4 13.Bxc4 e5 14.Qc2 exd4 
15.exd4 Nb6 16.Re1 Qf6 17.Bb3 Bf5 18.Qe2 Nd5 19.Bxd5 cxd5 20.Qb5 Qd6 21.
Qc5 Qxc5 22.Rxc5 Be6 23.Rc7 Rab8 24.Kf1 Rfc8 25.Rec1 Kf8 26.Ne5 Ke8 27.Nd3
Kd8 28.R7c3 Ke7 29.Nc5 Kd6 30.f3 Bf5 31.g4 Bd7 32.Ke2 Bc6 33.Kf2 Re8 34.
R3c2 Re7 35.b3 h5 36.h3 f6 37.Na6 Rh8 38.Nb4 Bd7 39.Rc5 Be6 40.Ra5 hxg4 
41.hxg4 Rh2+ 42.Kg3 Rd2 43.Rxa7 Rxd4 44.Nc2 Rd3 45.Na3 Bd7 46.Rxb7 Ree3 
47.Rf1 Re2 48.Rf2 Rdd2 49.Rxe2 Rxe2 50.Ra7 Ke6 51.Ra6+ Ke7 52.Rb6 Rxa2 53.
Nb5 Rd2 54.Nc7 d4 55.Nd5+ Kf7 56.Rd6 Be6 57.b4 Bxd5 58.Rxd5 Ke6 59.Rd8 Ke5
60.b5 Rb2 61.Re8+ Kd5 62.Rd8+ 1/2-1/2

[Event "CEGT 4"]
[Site "CEGT"]
[Date "2005.05.17"]
[Round "1.5"]
[White "Chess Tiger 15.0"]
[Black "Naum 1.71"]
[Result "1/2-1/2"]
[ECO "D56"]
[Variation "QGD: Lasker Defence, 9.Rc1 c6 10.Bd3"]

1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 h6 6.Bh4 O-O 7.e3 Ne4 8.Bxe7 
Qxe7 9.Rc1 c6 10.Bd3 Nxc3 11.Rxc3 Nd7 12.O-O dxc4 13.Bxc4 e5 14.Qc2 exd4 
15.exd4 Nb6 16.Bb3 Be6 17.Qe2 Rfe8 18.Re3 Nd5 19.Bxd5 cxd5 20.Re1 Rac8 21.
Qd1 Rc7 22.Ne5 Qb4 23.R3e2 Rec8 24.a3 Qb6 25.Qd2 Rc2 26.Qxc2 Rxc2 27.Rxc2 
Qxd4 28.Nf3 Qb6 29.Rd2 Qc7 30.Nd4 Bd7 31.h3 g6 32.Nc2 Qc5 33.Re3 Bb5 34.
Rc3 Bc4 35.Ne3 Qe7 36.Rd1 b5 37.Rd4 Qe5 38.Nc2 Ba2 39.Rd1 Qe2 40.Ne3 Qxb2 
41.Rc2 Qb3 42.Rdd2 Bb1 43.Rb2 Qc3 44.Nxd5 Qc1+ 45.Kh2 a5 46.Nf4 Bf5 47.Ne2
Qc5 48.Nd4 Bd7 49.Nb3 Qxa3 50.Nxa5 Qc3 51.Nb3 f6 52.Nd4 h5 53.g3 Kf7 54.
Rbc2 Qb4 55.Ne2 Bc6 56.Nd4 Be8 57.Rc7+ Kg8 58.Re2 Bf7 59.Rd7 Kf8 60.Ne6+ 
Bxe6 61.Rxe6 Qc5 62.Rxf6+ Ke8 63.Rh7 Qd4 64.Re6+ Kf8 65.Re2 Qd5 66.Rc2 Kg8
67.Ra7 Qf5 68.Rd2 Qf6 69.Rb7 b4 70.Rxb4 Qc6 71.Rdb2 Kg7 72.Rb7+ Kh6 73.Rf7
h4 74.gxh4 Qe4 75.Rbb7 Qe5+ 76.Kg1 Qe1+ 77.Kg2 Qe4+ 78.Kf1 Qh1+ 79.Ke2 
Qe4+ 80.Kd2 Qd4+ 81.Kc2 Qc4+ 82.Kb2 Qd4+ 83.Kb3 Qd5+ 84.Kb4 Qd4+ 85.Kb5 
Qd5+ 86.Kb6 Qd6+ 87.Ka7 Qc5+ 88.Kb8 Qe5+ 89.Ka8 Qa5+ 90.Ra7 Qd5+ 91.Kb8 
Qe5+ 92.Rfc7 Qe8+ 93.Rc8 Qe5+ 94.Rac7 Qb5+ 95.Rb7 Qe5+ 96.Rcc7 Qh8+ 97.Ka7
Qd4+ 98.Ka6 Qa4+ 99.Kb6 Qb3+ 100.Kc5 Qc3+ 101.Kd5 Qd3+ 102.Ke5 Qf5+ 103.
Kd6 Qf4+ 104.Ke7 Qxh4+ 105.Ke8 Qa4+ 106.Rd7 Qc6 107.Rc7 Qe4+ 108.Kf8 Qa8+ 
109.Ke7 Qe4+ 110.Kd6 Qd4+ 111.Kc6 Qxf2 112.Rh7+ Kg5 113.Rcg7 Qf6+ 114.Kd5 
Qe5+ 115.Kc4 Qe4+ 116.Kc5 Qe5+ 117.Kb6 Qd4+ 118.Kc7 Qc5+ 119.Kb7 Qb4+ 120.
Kc6 Qe4+ 121.Kb5 Qd3+ 122.Kc5 Qc3+ 123.Kd6 Qf6+ 124.Kd7 Qf7+ 125.Rxf7 
1/2-1/2

[Event "CEGT 40/40 (2Ghz)"]
[Site "?"]
[Date "2005.07.18"]
[Round "?"]
[White "The Baron 1.6.1"]
[Black "Pharaon 3.3"]
[Result "1/2-1/2"]
[ECO "D56"]
[EventDate "2006.02.??"]
[Variation "QGD: Lasker Defence, 9.Rc1 c6 10.Bd3"]
[PlyCount "175"]

1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 h6 6.Bh4 O-O 7.e3 Ne4 8.Bxe7 
Qxe7 9.Rc1 c6 10.Bd3 Nxc3 11.Rxc3 Nd7 12.O-O dxc4 13.Bxc4 e5 14.Qc2 exd4 
15.exd4 Nb6 16.Bb3 Be6 17.Re1 Bxb3 18.Rxb3 Qd7 19.Re4 Rae8 20.Ne5 Qd5 21.
Rg4 f5 22.Rf4 c5 23.Rxf5 Rxf5 24.Qxf5 cxd4 25.f4 Rf8 26.Qg4 Qe4 27.Rf3 Rf5
28.h3 h5 29.Qg3 Nd5 30.Ng6 Kh7 31.Kh2 Rf6 32.f5 Rxf5 33.Nh4 Rf6 34.Qg5 
Rxf3 35.Qxh5+ Kg8 36.Nxf3 d3 37.Qg5 Nf6 38.Qd2 Nd7 39.Kg1 Qd5 40.b3 Nc5 
41.Ng5 Kf8 42.Kf1 a6 43.b4 Nd7 44.Nf3 Nf6 45.Qe3 Ne4 46.Qf4+ Kg8 47.Qb8+ 
Kh7 48.Qe5 Nf6 49.Qe3 Kg8 50.Nd2 Qf5+ 51.Nf3 Kh8 52.Qd4 Qd5 53.a3 Qxd4 54.
Nxd4 Ne4 55.Nf3 Kh7 56.Ne5 Nd2+ 57.Ke1 Nb1 58.a4 d2+ 59.Kd1 Kh6 60.Nf7+ 
Kg6 61.Nd6 Kf6 62.Ne8+ Kf7 63.Nd6+ Kf6 64.Kc2 Ke5 65.Nxb7 Ke4 66.Na5 Kd4 
67.h4 Kd5 68.g4 Nc3 69.Kxd2 Nxa4 70.h5 Nb6 71.Ke3 Ke5 72.Nc6+ Kf6 73.Ke4 
Kg5 74.Ne5 Na8 75.Kf3 Nc7 76.Nf7+ Kf6 77.Nd8 Nd5 78.Nc6 Kg5 79.Kg3 Nf6 80.
Nb8 Nxg4 81.Nxa6 Ne3 82.b5 Nc4 83.Nc5 Kxh5 84.Ne4 Kg6 85.Kf4 Kf7 86.Nc5 
g5+ 87.Kf3 Kf6 88.b6 1/2-1/2

[Event "AMD 4600+"]
[Site "chessengines.de"]
[Date "2006.09.13"]
[Round "1"]
[White "Zap!Chess Reykjavik x64 2CPU"]
[Black "Naum 2.0 x64"]
[Result "0-1"]
[WhiteElo "2800"]
[BlackElo "2800"]
[ECO "D56"]
[Variation "QGD: Lasker Defence, 9.Rc1 c6 10.Bd3"]
[PlyCount "132"]

1.c4 Nf6 2.Nf3 e6 3.d4 d5 4.Nc3 Be7 5.Bg5 h6 6.Bh4 O-O 7.e3 Ne4 8.Bxe7 
Qxe7 9.Rc1 c6 10.Bd3 Nxc3 11.Rxc3 dxc4 12.Bxc4 Nd7 13.O-O e5 14.Qc2 e4 15.
Nd2 Nf6 16.f3 Bf5 17.Ra3 Bg6 18.fxe4 Nxe4 19.Nxe4 Bxe4 20.Qf2 Kh8 21.Bd3 
Bxd3 22.Rxd3 Rad8 23.Ra3 a6 24.Rb3 f5 25.Qg3 Rde8 26.Rf4 Rf6 27.Rf3 Kh7 
28.Qf2 Ref8 29.Rf4 R8f7 30.Qc2 Qe6 31.h4 g5 32.hxg5 hxg5 33.Rf3 Kg7 34.Qd3
Qd5 35.a3 Re6 36.Rc3 Qe4 37.Qxe4 Rxe4 38.Kf2 Kg6 39.g3 Rf6 40.Rc5 b6 41.
Rc3 Kh5 42.b3 Kg4 43.Ke2 Rh6 44.Rc1 Rd6 45.a4 Rdxd4 46.Rxc6 Rb4 47.Rc3 Re5
48.Rf1 b5 49.axb5 axb5 50.Kf2 Rd5 51.Ke2 Re4 52.Rd3 Ree5 53.Rxd5 Rxd5 54.
Rc1 b4 55.e4 Re5 56.Kf2 Rxe4 57.Rd1 f4 58.gxf4 gxf4 59.Rd8 Re3 60.Rg8+ Kf5
61.Rf8+ Ke5 62.Re8+ Kd4 63.Rf8 Rxb3 64.Rxf4+ Kd3 65.Rf3+ Kc2 66.Rf4 Rb1 
0-1

[Event "18'/40+18'/40+18'/40"]
[Site "AMD 4600+ chessengines.de"]
[Date "2006.09.30"]
[Round "13"]
[White "Hiarcs X54 x64 UCI"]
[Black "Fritz 9.0  256MB Athlon 1200 MHz"]
[Result "1/2-1/2"]
[WhiteElo "2756"]
[BlackElo "2800"]
[ECO "D56"]
[Variation "QGD: Lasker Defence, 9.Rc1 c6 10.Bd3"]
[PlyCount "74"]

1.d4 Nf6 2.Nf3 d5 3.Bg5 e6 4.c4 Be7 5.Nc3 h6 6.Bh4 O-O 7.e3 Ne4 8.Bxe7 
Qxe7 9.Rc1 c6 10.Bd3 Nxc3 11.Rxc3 dxc4 12.Bxc4 Nd7 13.O-O e5 14.Qc2 exd4 
15.exd4 Nb6 16.Bb3 Be6 17.Qe2 Nd5 18.Bxd5 cxd5 19.Rfc1 Qd7 20.Ne5 Qa4 21.
Qd2 Rac8 22.b3 Qa5 23.a4 Rxc3 24.Qxc3 Rc8 25.Qe3 Rxc1+ 26.Qxc1 Qb4 27.Qe3 
Bf5 28.g4 Be4 29.Nd7 Kh7 30.f3 Bc2 31.Kg2 h5 32.Qg5 Qd6 33.Qd8 Qf4 34.g5 
Qd2+ 35.Kh1 Qd1+ 36.Kg2 Qe2+ 37.Kg1 Qe3+ 1/2-1/2

[Event "18'/40+18'/40+18'/40"]
[Site "AMD 4600+ chessengines.de"]
[Date "2006.09.30"]
[Round "14"]
[White "Fritz 9.0  256MB Athlon 1200 MHz"]
[Black "Hiarcs X54 x64 UCI"]
[Result "0-1"]
[WhiteElo "2800"]
[BlackElo "2756"]
[ECO "D56"]
[Variation "QGD: Lasker Defence, 9.Rc1 c6 10.Bd3"]
[PlyCount "114"]

1.d4 Nf6 2.Nf3 d5 3.Bg5 e6 4.c4 Be7 5.Nc3 h6 6.Bh4 O-O 7.e3 Ne4 8.Bxe7 
Qxe7 9.Rc1 c6 10.Bd3 Nxc3 11.Rxc3 dxc4 12.Bxc4 Nd7 13.O-O e5 14.Qc2 exd4 
15.exd4 Nb6 16.Re1 Qf6 17.Bb3 Bf5 18.Qd2 Rae8 19.Ne5 Be6 20.Rf3 Qg5 21.Qd3
Nd5 22.Bc2 g6 23.Rg3 Nf4 24.Qd1 Qf6 25.Qd2 Bd5 26.Be4 Be6 27.b4 Rd8 28.Bf3
g5 29.b5 cxb5 30.Bxb7 Rd6 31.h4 Rfd8 32.Nc6 R8d7 33.Ba8 Kg7 34.hxg5 hxg5 
35.Re4 Kf8 36.Qb4 Bc4 37.a4 a6 38.Ne5 Rd8 39.Bb7 Ne2+ 40.Rxe2 Bxe2 41.Nc6 
Re8 42.Ne5 Kg7 43.Qc5 bxa4 44.Bf3 Bb5 45.Bd5 Rxe5 46.dxe5 Qxe5 47.Rxg5+ 
Qxg5 48.Qxd6 a3 49.Bb3 Qc1+ 50.Kh2 Qh6+ 51.Qxh6+ Kxh6 52.Bxf7 Kg5 53.Ba2 
Kf4 54.f3 Ke5 55.f4+ Kxf4 56.Bf7 Ke5 57.Ba2 Kd4 0-1

[Event "CT07Gambitg01"]
[Site "?"]
[Date "2007.01.04"]
[Round "12.1"]
[White "Rybka 2.2 w32 1CPU"]
[Black "Chess Tiger 2007 Gambit"]
[Result "1/2-1/2"]
[WhiteElo "2939"]
[BlackElo "2680"]
[ECO "D56"]
[EventDate "2007.01.01"]
[Variation "QGD: Lasker Defence, 9.Rc1 c6 10.Bd3"]
[TimeControl "40/1080:40/1080:600+10"]
[Annotator "0.19;0.44"]
[PlyCount "131"]
[EventType "simul"]

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.Nf3 O-O 6.e3 h6 7.Bh4 Ne4 8.Bxe7 
Qxe7 9.Rc1 c6 10.Bd3 Nxc3 11.Rxc3 dxc4 12.Bxc4 Nd7 13.Qc2 e5 14.O-O exd4 
15.exd4 Nb6 16.Re1 Qd8 17.Bb3 Nd5 18.Bxd5 Qxd5 19.Rb3 b6 20.Rbe3 Bf5 21.
Qa4 Bd7 22.Ne5 Rfd8 23.h3 Be8 24.Nf3 Bd7 25.Re5 Qd6 26.Rc1 c5 27.Qa3 Qg6 
28.dxc5 Bxh3 29.Ne1 Bd7 30.Rd5 Bc6 31.Rd6 Rxd6 32.cxd6 Bd5 33.Rd1 Qe6 34.
Nf3 Rd8 35.Qxa7 Rxd6 36.a3 Kh7 37.Qb8 Qf6 38.b4 Qg6 39.Nh4 Qe6 40.Nf3 Qf6 
41.a4 Qg6 42.Nh4 Qe6 43.Nf3 Rc6 44.Qe5 Bxf3 45.Qxe6 Rxe6 46.gxf3 Kg6 47.
Rd7 Re1+ 48.Kg2 Ra1 49.Ra7 Kf6 50.a5 bxa5 51.bxa5 g5 52.a6 h5 53.Ra8 Kf5 
54.Ra7 f6 55.Rh7 Kg6 56.Ra7 h4 57.Ra8 Kf5 58.a7 Ra3 59.Kg1 Ra2 60.Kg2 Ra1 
61.Kh2 Ra4 62.Kg2 Ra2 63.Kg1 Kf4 64.Rf8 Rxa7 65.Rxf6+ Ke5 66.Rf8 1/2-1/2

[Event "WC.2002.S.00007"]
[Site ""]
[Date "2000.??.??"]
[Round "?"]
[White "Aleshnya Valery Valentinovich (RUS)"]
[Black "Fernandez Fornes Juan Alberto (ARG)"]
[Result "1/2-1/2"]
[WhiteElo "2491"]
[BlackElo "2382"]
[ECO "D56"]
[Variation "QGD: Lasker Defence, 9.Rc1 c6 10.Bd3"]
[Annotator ""]
[Source "MegaCorr3"]
[Remark ""]

1.Nf3 d5 2.d4 Nf6 3.c4 e6 4.Nc3 Be7 5.Bg5 O-O 6.e3 h6 7.Bh4 Ne4 8.Bxe7 
Qxe7 9.Rc1 c6 10.Bd3 Nxc3 11.Rxc3 dxc4 12.Bxc4 Nd7 13.O-O e5 14.Qc2 exd4 
15.Nxd4 Ne5 16.Bb3 Rd8 17.h3 Rd6 18.Qe4 Bd7 19.Bc2 Ng6 20.Qxe7 Nxe7 21.Rd1
Rd8 22.Rcd3 Nc8 23.b4 Nb6 24.Nb3 Rxd3 25.Rxd3 Nd5 26.a3 b6 27.Rd2 Kf8 28.
Be4 Ne7 29.g4 Ke8 30.f4 Be6 31.Rxd8+ Kxd8 32.Bc2 f6 33.Kf2 Kc7 34.Nd4 Bd7 
35.Ne2 c5 36.bxc5 bxc5 37.Ng3 Be8 38.Nf5 Nxf5 39.gxf5 Kd6 40.e4 c4 41.Ke3 
Kc5 42.h4 Bb5 43.e5 fxe5 44.fxe5 Kd5 45.e6 Ke5 46.Kd2 Kd4 47.f6 c3+ 48.Kc1
gxf6 49.Bg6 Kc4 50.Kc2 Ba4+ 51.Kc1 f5 52.e7 Kb3 53.h5 Kxa3 54.Bxf5 Kb4 
1/2-1/2

[code]
Top
Ron Murawski
Posts: 397
Joined: Sun Oct 29, 2006 4:38 am
Location: Schenectady, NY

Re: Here is a position, where computers make an inferior cho

Post by Ron Murawski »

Dann Corbit wrote:From this position:
[D]r1b2rk1/pp1nqpp1/2p4p/4p3/2BP4/2R1PN2/PP3PPP/3Q1RK1 w - - id "NNSSL.021"; pm Qc2 d5; c0 "Actually, Qc2 is doubtful.";
This should be a book move, not a chess engine evaluation position.

Horizon's opening book has [move(probability)]: Bb3 (50%) and Qb1(50%). I have decided to delete Qb1 from the book, making Bb3 the only move.

The ChessBase book from ChessTiger 14.0 has [move(probability)]: Bb3(68.5%), dxe5(24%) and h3(7.4%). The CheesBase book shows the following win percentages: Bb3(58%) dxe5(50%) h3(50%)

Ron
Top
NKOTB

Re: Here is a position, where computers make an inferior cho

Post by NKOTB »

Qc2 seems to lock the rook out at c3 leaving no retreat. In the long run, it just not seem to be a good GM move. In the short term I can see the pluses from an engine's point of view, a Q & R double on a file along with grabbing the c2-h7 diagonal. For me, no Qc2.
Top
Uri Blass
Posts: 10309
Joined: Thu Mar 09, 2006 12:37 am
Location: Tel-Aviv Israel

Re: Here is a position, where computers make an inferior cho

Post by Uri Blass »

Here is another position from

http://www.chessguru.de/palview/wc26ct03/wc26ct03.htm

[Event "WCCC26CT03(WS)"]
[Site "ICCF"]
[Date "2006.07.30"]
[Round "?"]
[White "Schön, Wolfram"]
[Black "Savchur, Fedir"]
[Result "1-0"]
[WhiteElo "2674"]
[BlackElo "2506"]
[PlyCount "22"]
[EventDate "2006.??.??"]

1. e4 {[%ccsnt 2006.08.13,22:02]} e6 {[%ccsnt 2006.08.14,21:35]} 2. d4 {
[%ccsnt 2006.08.17,12:48]} d5 {[%ccsnt 2006.08.18,08:59]} 3. Nc3 {
[%ccsnt 2006.08.19,19:25]} Bb4 {[%ccsnt 2006.08.20,18:26]} 4. e5 {
[%ccsnt 2006.08.24,11:08]} c5 {[%ccsnt 2006.08.25,08:42]} 5. a3 {
[%ccsnt 2006.08.26,20:25]} Bxc3+ {[%ccsnt 2006.08.27,20:08]} 6. bxc3 {
[%ccsnt 2006.08.28,12:50]} Ne7 {[%ccsnt 2006.09.01,08:53]} 7. Qg4 {
[%ccsnt 2006.09.16,18:26]} O-O {[%ccsnt 2006.09.18,22:34]} 8. Bd3 {
[%ccsnt 2006.09.19,12:30]} Nbc6 {[%ccsnt 2006.09.26,10:21]} 9. Bg5 {
[%ccsnt 2006.10.08,15:47]} Qa5 {[%ccsnt 2006.11.18,01:29]} 10. Ne2 {
[%ccsnt 2006.11.18,19:13]} b6 {[%ccsnt 2006.12.03,14:09]} 11. h4 {
[%ccsnt 2006.12.14,13:39]} c4 {[%ccsnt 2007.01.24,13:41]} 1-0



Black(Fedir Savchur) played 10...b6 maybe because rybka suggest that move(maybe the error was earlier and I do not know).

Note that Wolferm writes in the following link:
http://www.chessguru.de/index.html

"Allthough the game is just 11 moves, White is winning anyway, I think."



Schön,W - Savchur,F, WCCC26CT03(WS) 2006
r1b2rk1/pp2nppp/2n1p3/q1ppP1B1/3P2Q1/P1PB4/2P1NPPP/R3K2R b KQ - 0 1

Analysis by Rybka 2.3.1 32-bit :

10...c5xd4
³ (-0.32) Depth: 2 00:00:00
10...c5xd4
³ (-0.40) Depth: 3 00:00:00
10...c5xd4
³ (-0.40) Depth: 4 00:00:00
10...c5xd4 11.Bg5xe7
³ (-0.29) Depth: 5 00:00:00
10...c5xd4 11.Bg5xe7 Nc6xe7 12.Qg4-h4
= (-0.07) Depth: 6 00:00:00 6kN
10...Rf8-e8 11.Bg5xe7 Re8xe7 12.d4xc5 Nc6xe5
= (-0.10) Depth: 6 00:00:00 21kN
10...Rf8-e8 11.Bg5xe7 Re8xe7 12.d4xc5 Nc6xe5 13.Bd3xh7+ Kg8-f8
= (-0.09) Depth: 7 00:00:00 28kN
10...Rf8-e8 11.Bg5xe7 Re8xe7 12.d4xc5 Qa5xc5 13.Qg4-f4 Qc5-a5 14.0-0
= (-0.10) Depth: 8 00:00:00 54kN
10...Rf8-e8 11.Bg5xe7 Re8xe7 12.d4xc5 g7-g6 13.0-0 Nc6xe5 14.Qg4-b4
= (-0.03) Depth: 9 00:00:01 91kN
10...c5xd4 11.Bg5xe7 Nc6xe7 12.Qg4-h4 Ne7-g6 13.Qh4xd4 f7-f5 14.0-0
= (-0.07) Depth: 9 00:00:01 106kN
10...c5xd4 11.Bg5xe7 Nc6xe7 12.Qg4-h4 Ne7-g6 13.Qh4xd4 f7-f5 14.0-0 Bc8-d7
= (-0.06) Depth: 10 00:00:02 126kN
10...c5xd4 11.Bg5xe7 Nc6xe7 12.Qg4-h4 Ne7-g6 13.Qh4xd4 Bc8-d7 14.0-0 Ra8-c8 15.f2-f4
= (-0.10) Depth: 11 00:00:03 246kN
10...c5xd4 11.Bg5xe7 Nc6xe7 12.Qg4-h4 Ne7-g6 13.Qh4xd4 Bc8-d7 14.0-0 Ra8-c8 15.f2-f4 Rc8-c7
= (-0.08) Depth: 12 00:00:04 313kN
10...b7-b6 11.Qg4-h3 Ne7-g6 12.0-0 Bc8-a6 13.Ne2-f4 Ba6xd3 14.Qh3xd3 Ng6xf4 15.Bg5xf4 Qa5-a4 16.Rf1-d1
= (-0.12) Depth: 12 00:00:25 1881kN
10...b7-b6 11.Qg4-h3 Ne7-g6 12.0-0 Bc8-a6 13.Ne2-f4 Ba6xd3 14.Qh3xd3 Ng6xf4 15.Bg5xf4 Qa5-a4 16.Bf4-e3 c5-c4
= (-0.14) Depth: 13 00:00:29 2176kN
10...b7-b6 11.Qg4-h3 Ne7-g6 12.0-0 Bc8-a6 13.Ne2-f4 Ba6xd3 14.Qh3xd3 Ng6xf4 15.Bg5xf4 Qa5-a4 16.Bf4-e3 c5-c4 17.Qd3-e2
= (-0.14) Depth: 14 00:00:39 2960kN
10...b7-b6 11.Bg5xe7 Nc6xe7 12.0-0 Bc8-a6 13.Rf1-b1 Ra8-c8 14.d4xc5 Ba6xd3 15.c2xd3 Qa5xc5 16.Rb1-b2
= (-0.18) Depth: 15 00:01:34 6926kN
10...b7-b6 11.Bg5xe7 Nc6xe7 12.0-0 Bc8-a6 13.Rf1-b1 Ra8-c8 14.d4xc5 Ba6xd3 15.c2xd3 Qa5xc5 16.Rb1-b3
= (-0.17) Depth: 16 00:02:17 10181kN
10...b7-b6 11.0-0 Bc8-a6 12.Rf1-c1 Ba6xd3 13.c2xd3 Ra8-c8 14.Bg5xe7 Nc6xe7 15.d4xc5 Rc8xc5 16.Qg4-g5 Ne7-f5 17.g2-g4
= (-0.19) Depth: 17 00:08:47 37365kN

(, 15.04.2007)
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Uri Blass
Posts: 10309
Joined: Thu Mar 09, 2006 12:37 am
Location: Tel-Aviv Israel

Re: Here is a position, where computers make an inferior cho

Post by Uri Blass »

some analysis by rybka after b6 h4

Schön,W - Savchur,F, WCCC26CT03(WS) 2006
r1b2rk1/p3nppp/1pn1p3/q1ppP1B1/3P2QP/P1PB4/2P1NPP1/R3K2R b KQ h3 0 1

Analysis by Rybka 2.3.1 32-bit :

11...c5xd4
³ (-0.28) Depth: 2 00:00:00
11...c5-c4
³ (-0.54) Depth: 2 00:00:00
11...c5-c4
³ (-0.44) Depth: 3 00:00:00
11...c5-c4
³ (-0.53) Depth: 4 00:00:00
11...c5-c4 12.Bg5-h6
³ (-0.52) Depth: 5 00:00:00
11...c5-c4 12.Bg5-h6 g7-g6
³ (-0.60) Depth: 6 00:00:00 3kN
11...c5-c4 12.Bg5-h6 g7-g6 13.Bh6xf8
³ (-0.41) Depth: 7 00:00:00 6kN
11...c5-c4 12.Bg5-h6 g7-g6 13.Bh6xf8 Kg8xf8 14.h4-h5
³ (-0.60) Depth: 8 00:00:00 12kN
11...c5-c4 12.Bg5-h6 g7-g6 13.Bh6xf8 Kg8xf8 14.Bd3xg6 h7xg6 15.h4-h5 Bc8-a6
³ (-0.46) Depth: 9 00:00:00 22kN
11...c5-c4 12.Bg5-h6 g7-g6 13.Bd3xg6 h7xg6 14.Bh6xf8 Kg8xf8 15.h4-h5 g6xh5 16.Rh1xh5 Ne7-g6
= (-0.25) Depth: 10 00:00:01 53kN
11...c5-c4 12.Bg5-h6 g7-g6 13.Bd3xg6 h7xg6 14.Bh6xf8 Kg8xf8 15.h4-h5 g6xh5 16.Rh1xh5 Ne7-g6 17.Qg4-f3
= (-0.24) Depth: 11 00:00:02 155kN
11...c5-c4 12.Bg5-h6 g7-g6 13.Bd3xg6 h7xg6 14.Bh6xf8 Kg8xf8 15.h4-h5 g6xh5 16.Rh1xh5 Ne7-g6 17.Qg4-f3 Kf8-g8
³ (-0.27) Depth: 12 00:00:05 287kN
11...c5-c4 12.Bg5-h6 g7-g6 13.Bd3xg6 h7xg6 14.Bh6xf8 Kg8xf8 15.h4-h5 g6xh5 16.Rh1xh5 Ne7-g6 17.Qg4-f3 Kf8-g8 18.Qf3-f6
³ (-0.36) Depth: 13 00:00:09 480kN
11...c5-c4 12.Bg5-h6 g7-g6 13.Bd3xg6 h7xg6 14.Bh6xf8 Kg8xf8 15.h4-h5 g6xh5 16.Rh1xh5 Ne7-g6 17.Rh5-h7 Ra8-b8 18.Qg4-g5
= (-0.05) Depth: 14 00:00:14 720kN
11...Ne7-f5 12.Bg5-d2 Qa5-a4 13.Qg4-f4 Nf5-e7 14.d4xc5 Qa4xf4 15.Ne2xf4 b6xc5 16.Ra1-b1 Nc6xe5 17.Bd3-e2 Bc8-d7 18.Bd2-e3
= (-0.12) Depth: 14 00:01:02 3724kN
11...Ne7-f5 12.Bg5-d2 Qa5-a4 13.Qg4-f4 Bc8-a6 14.d4xc5 Qa4xf4 15.Bd2xf4 Ba6xd3 16.c2xd3 b6xc5 17.f2-f3 Ra8-b8
= (-0.10) Depth: 15 00:01:35 5698kN
11...Ne7-f5 12.Bg5-d2 Qa5-a4 13.Qg4-f4 Bc8-a6 14.d4xc5 Qa4xf4 15.Bd2xf4 Ba6xd3 16.c2xd3 b6xc5 17.f2-f3 Ra8-b8 18.Ke1-f2
= (-0.10) Depth: 16 00:02:01 7147kN
11...Ne7-f5 12.Bg5-d2 Qa5-a4 13.Qg4-f4 Bc8-a6 14.d4xc5 Qa4xf4 15.Bd2xf4 Ba6xd3 16.c2xd3 b6xc5 17.f2-f3 Rf8-b8 18.Ke1-f2
= (-0.21) Depth: 17 00:03:01 10845kN
11...Ne7-f5 12.h4-h5 Nc6xd4 13.Bg5-f6 Nd4xe2 14.Bd3xf5 Qa5xc3+ 15.Ke1-f1 Ne2-g3+ 16.f2xg3 Bc8-a6+ 17.Bf5-d3 Ba6xd3+ 18.c2xd3
² (0.57) Depth: 18 00:23:19 75957kN
11...c5xd4 12.Bg5-f6 Ne7-g6 13.Bd3xg6 f7xg6 14.h4-h5 g6-g5 15.Qg4xg5 Rf8-f7 16.h5-h6 g7-g6 17.0-0 Qa5-a4 18.Ne2xd4
= (0.19) Depth: 18 00:27:40 90412kN
11...c5xd4 12.Bg5-f6 Ne7-g6 13.Bd3xg6 f7xg6 14.h4-h5 g6-g5 15.Qg4xg5 Rf8-f7 16.h5-h6 g7-g6 17.0-0 Qa5-a4 18.Ne2xd4
= (0.18) Depth: 19 00:36:36 117912kN

(, 15.04.2007)
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