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Subject: Re: Paderborn : A "human" pawn sac by Comet !

Author: Paulo Soares

Date: 04:39:44 02/12/00

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On February 11, 2000 at 20:39:16, Howard Exner wrote:

>On February 11, 2000 at 09:51:12, Côme wrote:
>
>>
>>Hello,
>>
>>In this position of the game SOS - Comet :
>>
>>[D]r1bq1rk1/ppn1ppbp/2p3p1/4P3/3P4/1QN2N2/PP3PPP/R1B2RK1 b - -
>>
>>Comet play Bg4! and give the b7 pawn !
>>
>>Can you test if other programs play Bg4! ?
>>
>>Best Regards
>>Alexandre Côme
>
>Bg4 may be a good move but Comet was unable to follow it up
>with anything threatening. In fact Comet lost this game.
>What winning line did Comet not see after playing Bg4?

Howard, I forgot to test Fritz5.32 at this position.
Below the analysis, since depth 9. Jeff is right, Fritz5.32
found Bg4 fast and with a hight evaluation.

PIII-450 HT=128Mb
r1bq1rk1/ppn1ppbp/2p3p1/4P3/3P4/1QN2N2/PP3PPP/R1B2RK1 b - - 0 1

Analysis by Fritz 5.32:
1...Qd7 2.Be3 Rd8 3.Rac1 Nd5 4.Bg5 Qe6 5.Nxd5 Rxd5 6.Qc2
  =  (-0.25)   Depth: 9/22   00:00:02  530kN
1...Nd5
  ³  (-0.28)   Depth: 9/25   00:00:03  913kN
1...Nd5 2.Be3 Nb6 3.Ng5 h6 4.Nge4 Be6 5.Qc2 Nd5
  ³  (-0.31)   Depth: 9/25   00:00:04  1198kN
1...Nd5 2.Be3 b6 3.Nxd5 Qxd5 4.Qxd5 cxd5 5.Rfc1 Bg4 6.Rc7
  =  (-0.25)   Depth: 10/26   00:00:07  2383kN
1...b6
  ³  (-0.28)   Depth: 10/26   00:00:09  2997kN
1...Bg4
  ³  (-0.31)   Depth: 10/26   00:00:12  3963kN
1...Bg4 2.Qxb7 Bxf3 3.gxf3 Qd7 4.Qb4 Rfd8 5.Re1 Rab8 6.Qc5
  ³  (-0.34)   Depth: 10/28   00:00:13  4409kN
1...Bg4 2.Qxb7 Bxf3 3.gxf3 Qd7 4.Qb4 Rfd8 5.Be3 Rab8 6.Qa3
  ³  (-0.34)   Depth: 11/27   00:00:18  6401kN
1...Bg4 2.Qxb7 Bxf3 3.gxf3 Qd7 4.Qb4 Rab8 5.Qa4 Rfd8 6.Qxa7
  ³  (-0.41)   Depth: 12/31   00:00:41  15117kN
1...Bg4 2.Qxb7 Bxf3 3.gxf3 Ne6 4.d5 cxd5 5.Qxd5 Qc7 6.f4
  ³  (-0.50)   Depth: 13/33   00:02:57  67240kN
1...Bg4 2.Qxb7 Bxf3 3.gxf3 Qd7 4.Qb4 f6 5.Qb3+ Nd5 6.Nxd5
  ³  (-0.50)   Depth: 14/36   00:05:43  131043kN

Paulo Soares, from Brazil




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