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Subject: Re: Capablanca testposition.

Author: Miho King

Date: 23:29:01 08/20/03

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On August 20, 2003 at 15:53:13, George Tsavdaris wrote:

>The following position is from a game between Capablanca and Bernstein
>from Chessmaster's library.
>
>In the annotation says after the move 25...Rh8  :
>"Other moves are no better. Two variations given by Capablanca are 25...g5 26.e5
>f6 27.Qd3, and 25...g6 26.Qxh6+ Kg8 27.e5 gxh5 28.gxh5, and there is no answer
>to the threat of Re1-e2-g2+."
>
>But Deep Junior 8/Shredder 7.04/Fritz 8  prefer  25...Rg8 with a
>score ~ -1.00 for black.
>Who is wrong? Capablanca and the annotator who believe there is no
>defence, or the todays top programs who found Rg8 and believe black
>is better?
>
>[D]4rr2/p1pb1ppk/2ppn2p/5N1N/4P1P1/1P2QP2/1q5P/2R1R1K1 b - - 0 25

Analysis by Fritz 8 (P4 3.3Ghz, 512MB hashtable):


  µ  (-0.97)   Hloubka: 7/28   00:00:00  528kN
1...Rg8 2.Re2 Qe5 3.Nhxg7
  µ  (-0.97)   Hloubka: 8/28   00:00:01  1173kN
1...Rg8 2.Re2 Qe5 3.Ra2 Ng5
  µ  (-1.06)   Hloubka: 9/30   00:00:02  2385kN
1...Rg8 2.Kh1 Qe5 3.Ra1 Rb8 4.Rxa7 Rge8 5.Rea1 Qb2 6.Nhxg7 Nxg7
  µ  (-1.06)   Hloubka: 10/34   00:00:06  6534kN
1...Rg8 2.Kh1 Qe5 3.f4 Qb2 4.Re2 Qa3
  µ  (-1.00)   Hloubka: 11/34   00:00:11  12213kN
1...Rg8 2.Kh1 Qe5 3.f4 Qb2 4.Re2 Qa3 5.Nfxg7 Rxg7 6.Nf6+ Kh8 7.Nxd7 Nd4 8.Ree1
Qxb3 9.Rc3 Qb4
  µ  (-1.00)   Hloubka: 12/36   00:00:24  26659kN
1...Rg8 2.Kh1 Qe5 3.f4 Qb2 4.Re2 Qa3 5.Nfxg7 Rxg7 6.Nf6+ Kh8 7.Nxd7 Nd4 8.Ree1
Qxb3 9.Rc3 Qb4
  µ  (-1.00)   Hloubka: 13/36   00:00:53  62464kN
1...Rg8--
  µ  (-0.72)   Hloubka: 14/40   00:01:40  117973kN
1...Rg8 2.Kh1 Ng5
  µ  (-0.72)   Hloubka: 14/47   00:03:11  223877kN
1...Rg8--
  ³  (-0.44)   Hloubka: 15/42   00:07:59  572941kN
1...Rg8 2.Kh1 d5
  ³  (-0.44)   Hloubka: 15/59   00:09:41  703192kN
1...g5!
  ³  (-0.47)   Hloubka: 15/59   00:15:56  1172558kN
1...g5!
  ³  (-0.63)   Hloubka: 15/59   00:22:59  1695544kN
1...g5 2.Rc3 f6 3.Qd3 c5 4.Rb1 Qa2 5.Rcc1 Rb8 6.Qc3 Nf4 7.Nxf4
  µ  (-0.72)   Hloubka: 15/59   00:33:06  2443885kN
1...g5 2.Rc3 f6 3.Qd3 Kh8 4.Nxh6 c5 5.Nf5 Bb5 6.Qc2 Qxc2 7.Rxc2 Rb8
  ³  (-0.59)   Hloubka: 16/49   00:40:33  2999944kN
1...g5 2.Rc3 f6 3.Qd3 Kh8 4.Nxh6 c5 5.Nf5 Bb5 6.Qc2 Qxc2 7.Rxc2 Rb8 8.Kf2 Kh7
  ³  (-0.63)   Hloubka: 17/46   01:02:38  4685390kN
1...g5 2.Rc3 f6 3.Qd3 Nf4 4.Nxf4 gxf4 5.Nh4 Rf7 6.Ng2 f5 7.gxf5 Rg7 8.Qc2
  µ  (-0.72)   Hloubka: 18/52   02:26:37  11051318kN
1...g5 2.Rc3 f6 3.Qd3 Nf4 4.Nxf4 gxf4 5.Nh4 Rf7 6.Ng2 f5 7.gxf5 Rg7 8.Qc2 Qxc2
  µ  (-0.72)   Hloubka: 19/51   05:18:29  24374562kN


So Fritz changed his mind in 15 ply.



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