Author: Robert Hyatt
Date: 07:51:14 12/31/03
Go up one level in this thread
On December 30, 2003 at 03:19:52, David Dahlem wrote:
>El Chinito 3.25 was winning in this game but seemed to have trouble with this
>critical position, with large jumps in evaluation up and down. After 44. Bxc5,
>Ktulu announced mate in 11 two moves later.
>
>[D]R7/p1p1kp2/2p2p2/2Np1Pr1/1P6/P1P2b1r/KR2N2P/6b1 b - - 4 44
>
>El Chinito 3.25 Analysis
> 7 00:01 -0.73 Bxh2 Nd4 Be5 Rxa7 Kd6 a4 Bd1
> 8 00:02 -1.25 Bxc5 bxc5 Rxh2 Nd4 Rxb2+ Kxb2 Bg4 Nxc6+ Kd7 Nb4 a5 c6+ Kd6
>Rxa5
> 9 00:02 -1.25 Bxc5 bxc5 Rxh2 Nd4 Rxb2+ Kxb2 Bg4 Nxc6+ Kd7 Nb4 a5 c6+ Kd6
>Rxa5
>10 00:03 -1.29 Bxc5 bxc5 Rxh2 Nd4 Rxb2+ Kxb2 Be4 Rxa7 Kd7 a4 Bxf5 a5
>11 00:06 -1.24 Bxc5 bxc5 Rxh2 Nd4 Rxb2+ Kxb2 Rg2+ Kc1 Be4 Nxc6+ Kd7 Nd4 a5
>c6+
>12 00:11 -1.24 Bxc5 bxc5 Rxh2 Nd4 Rxb2+ Kxb2 Rg2+ Kc1 Be4 Nxc6+ Kd7 Nd4 Rg3
>c6+
>13 01:25 1.96 Bxc5 bxc5 Rgh5 Ng1 Kd7 Nxh3 Rxh3 Rxa7 Be4 Kb3 Bxf5 a4 d4 Kc4
>
>Does any other engine have problems avoiding 44. Bxc5?
>Here is the complete game. On move 45, El Chinito's evaluation went to -1.67.
>
>[Event "Ktulu Gauntlet 40/10"]
>[Site "?"]
>[Date "2003.12.30"]
>[Round "1"]
>[White "Ktulu 4.2"]
>[Black "El Chinito 3.25"]
>[Result "1-0"]
>[TimeControl "40/600:40/600:40/600"]
>
>1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.Qe2 Qe7 {-0.30/11 12} 6.d3 {0.30/11 15}
>Nf6 {-0.32/11 12} 7.Bg5 {0.25/10 10} Qxe2+ {-0.24/10 11} 8.Bxe2 {0.21/12 10} Nc6
>{-0.26/10 11} 9.Nc3 {0.20/11 14} Be6 {-0.23/10 11} 10.Bxf6 {0.27/11 19} gxf6
>{-0.31/10 4} 11.O-O-O {0.25/11 11} O-O-O {-0.33/11 13} 12.d4 {0.24/12 17} d5
>{-0.33/10 12} 13.Bb5 {0.21/11 11} Bh6+ {-0.13/10 12} 14.Kb1 {0.21/12 13} Rhg8
>{-0.15/11 12} 15.Bxc6 {0.29/12 9} bxc6 {0.00/11 12} 16.Ne1 {0.26/13 22} Rde8
>{-0.28/11 12} 17.f3 {0.23/12 21} Bd7 {0.03/11 12} 18.g3 {0.15/12 17} Re3
>{0.00/11 13} 19.Rf1 {0.13/12 12} Bh3 {0.00/11 12} 20.Rf2 {0.04/14 15} Rge8
>{-0.11/12 12} 21.Nd3 {-0.02/14 30} R3e6 {-0.10/12 13} 22.f4 {0.07/12 13} Bg4
>{0.01/11 13} 23.Rg1 {0.16/12 14} Bg7 {0.01/10 13} 24.f5 {0.27/12 14} R6e3
>{0.08/11 13} 25.Rgf1 {0.22/12 26} h5 {0.23/10 13} 26.a3 {0.25/12 26} Bf8
>{0.06/10 14} 27.Ka2 {0.23/12 15} Bd6 {0.11/10 13} 28.Rd2 {0.24/11 9} h4 {0.33/11
>14} 29.gxh4 {-0.28/11 9} Rh3 {0.31/10 15} 30.Rg2 {-0.33/11 28} Rxh4 {0.72/11 14}
>31.Rff2 {-0.50/11 11} Bh5 {0.58/11 14} 32.Rg7 {-0.46/12 17} Rxd4 {0.56/12 14}
>33.Rh7 {-0.58/13 16} Rh4 {0.66/12 15} 34.Ne2 {-0.34/13 24} Rg8 {0.42/12 15}
>35.Ng3 {-0.19/12 32} Rg5 {0.60/11 16} 36.Rh6 {-0.19/12 19} Be5 {0.77/10 16}
>37.Nc5 {-0.12/11 14} Kd8 {0.53/12 18} 38.Rh8+ {-0.14/11 12} Ke7 {0.63/11 5}
>39.b4 {-0.17/12 14} Rh3 {1.09/11 19} 40.Ra8 {-0.09/11 5} Bd4 {0.66/12 20} 41.Rg2
>{-0.15/12 7} Be3 {0.58/12 22} 42.c3 {0.00/12 12} Bf3 {0.56/11 22} 43.Rb2
>{-0.76/11 14} Bg1 {1.19/11 23} 44.Ne2 {-0.84/11 12} Bxc5 {1.24/12 45} 45.bxc5
>{0.27/13 9} Rxh2 {-1.67/11 13} 46.Rbb8 {M11/14 77} Rxe2+ {-M10/13 13} 47.Kb3
>Rb2+ {-M9/15 11} 48.Kxb2 Rg2+ {-M8/14 11} 49.Kc1 Rg1+ {-M7/14 11} 50.Kd2 Rg2+
>{-M6/13 12} 51.Ke3 Re2+ {-M5/13 11} 52.Kxf3 Re3+ {-M4/12 11} 53.Kxe3 Kd7 {-M3/10
>12} 54.Rxa7 d4+ {-M2/10 11} {Black resigns} 1-0
>
>Regards
>Dave
Crafty drops it with a draw score quickly and moves on to something else:
depth time score variation (1)
starting thread 1
starting thread 2
starting thread 3
7 0.08 -1.47 1. ... Bxc5 2. bxc5 Rxh2 3. Nd4 Rxb2+
4. Kxb2 Rg2+ 5. Kb3 Bd1+ 6. Kb4 Rb2+
7. Ka5 a6 8. Kxa6
7-> 0.13 -1.47 1. ... Bxc5 2. bxc5 Rxh2 3. Nd4 Rxb2+
4. Kxb2 Rg2+ 5. Kb3 Bd1+ 6. Kb4 Rb2+
7. Ka5 a6 8. Kxa6 (s=2)
8 0.19 -- 1. ... Bxc5
8 0.34 -0.01 1. ... Bxc5 2. bxc5 Bxe2 3. Rxe2+ Kd7
4. Rae8 Rg2 5. Re7+ Kd8 6. Re8+ Kd7
8 0.92 -1.13 1. ... d4 2. Nxg1 Bd5+ 3. Nb3 Rxg1
4. Rxa7 Bxb3+ 5. Kxb3 Rxc3+ 6. Ka2
Kd6 7. Rd2 d3 <HT>
8-> 1.04 -1.13 1. ... d4 2. Nxg1 Bd5+ 3. Nb3 Rxg1
4. Rxa7 Bxb3+ 5. Kxb3 Rxc3+ 6. Ka2
Kd6 7. Rd2 d3 <HT>
9 1.38 -1.13 1. ... d4 2. Nxg1 Bd5+ 3. Nb3 Rxg1
4. Rxa7 Bxb3+ 5. Kxb3 Rxc3+ 6. Ka2
Kd6 7. Rd2 d3
9-> 1.57 -1.13 1. ... d4 2. Nxg1 Bd5+ 3. Nb3 Rxg1
4. Rxa7 Bxb3+ 5. Kxb3 Rxc3+ 6. Ka2
Kd6 7. Rd2 d3
10 2.51 -1.40 1. ... d4 2. Nxg1 Bd5+ 3. Nb3 Rxg1
4. Rxa7 Kd6 5. Rc2 Rxc3 6. Rxc3 Rg2+
7. Kb1 dxc3
10-> 2.80 -1.40 1. ... d4 2. Nxg1 Bd5+ 3. Nb3 Rxg1
4. Rxa7 Kd6 5. Rc2 Rxc3 6. Rxc3 Rg2+
7. Kb1 dxc3
11 5.45 -1.31 1. ... d4 2. c4 Rxh2 3. Nxg1 Rxb2+
4. Kxb2 Rg2+ 5. Kc1 Rxg1+ 6. Kd2 Rd1+
7. Kc2 Be2 8. Rxa7 d3+ 9. Kc3 Kd6 10.
a4
11-> 6.10 -1.31 1. ... d4 2. c4 Rxh2 3. Nxg1 Rxb2+
4. Kxb2 Rg2+ 5. Kc1 Rxg1+ 6. Kd2 Rd1+
7. Kc2 Be2 8. Rxa7 d3+ 9. Kc3 Kd6 10.
a4
12 10.87 -1.40 1. ... d4 2. c4 Rxh2 3. Nxg1 Rxb2+
4. Kxb2 Rg2+ 5. Kc1 Bg4 6. Rxa7 Kd6
7. Ne4+ Ke5 8. Nc5 Kxf5 9. Rxc7 Rxg1+
12-> 12.05 -1.40 1. ... d4 2. c4 Rxh2 3. Nxg1 Rxb2+
4. Kxb2 Rg2+ 5. Kc1 Bg4 6. Rxa7 Kd6
7. Ne4+ Ke5 8. Nc5 Kxf5 9. Rxc7 Rxg1+
13 20.44 -1.44 1. ... d4 2. c4 Rxh2 3. Nxg1 Rxb2+
4. Kxb2 Rg2+ 5. Kc1 Bg4 6. Rxa7 Kd6
7. Ra5 Rxg1+ 8. Kd2 Ke5 9. Nd3+ Ke4
10. Nf2+ Kf3 11. Nxg4 Rxg4
? 13 23.32 30/30* 1. ... Rgh5
Black(0): ?
time=25.51 cpu=392% mat=-1 n=62089764 fh=91% nps=2.43M
ext-> chk=2184151 cap=166948 pp=60632 1rep=136492 mate=7283
predicted=0 nodes=62089764 evals=20565994
endgame tablebase-> probes=0 hits=0
My first guess would be that your check extensions are not doing what they
should to let you pick up the repetition and avoid the draw, although
obviously that repetition later turns into a mate.
If I give crafty this position and I play Bxc5, the score goes to +2 instantly,
and +3 very quickly.
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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