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Subject: Re: Wich engine avoids draw after Qxb2 ?

Author: Uri Blass

Date: 02:33:04 01/24/04

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On January 24, 2004 at 05:02:37, Evgeny Shu wrote:

>I posted this position not so long ago and it seems Deep Fritz 8 can't avoid
>draw and plays Qxb2? wich leads to draw after Qxb2 Rb1 Qa2 Ra1 Qc4 Ng3 Qxc3 Bd2
>Qb2 Rb1 Qa2 Ra1 1/2-1/2 ;
>Why is that ?
>
>[D] r1b2rk1/pp1nbppp/1qn1p3/2ppP3/P2P1P2/2P1BN2/1P2N1PP/R2QKB1R b KQ - 0 10


probably because Fritz is not a good enough.

My stupid movei can avoid Qxb2 in a slow hardware(P850) faster than Fritz8(I do
not have deep fritz8) and I did not implement the botvinik extension that should
help(because of repeated threats against the same piece(the queen)).


New game
r1b2rk1/pp1nbppp/1qn1p3/2ppP3/P2P1P2/2P1BN2/1P2N1PP/R2QKB1R b KQ - 0 1

Analysis by Fritz 8:

1...Qxb2 2.Rb1
  µ  (-0.88)   Depth: 7/27   00:00:00  121kN
1...Qxb2 2.Rb1 Qa2 3.Ra1 Qc4 4.a5 Qb5 5.dxc5 Nxc5 6.Ned4
  µ  (-0.88)   Depth: 8/23   00:00:00  206kN
1...Qxb2 2.Rb1 Qa2 3.Ra1 Qc4 4.Qd2 Qb3 5.dxc5 Nxc5 6.Nfd4 Nxd4 7.Nxd4
  µ  (-0.91)   Depth: 9/28   00:00:02  891kN
1...Qxb2 2.Rb1 Qa2 3.Ra1 Qc4 4.Qd2 Qb3 5.dxc5 Nxc5 6.Nfd4 Nxd4
  µ  (-0.91)   Depth: 10/35   00:00:13  4867kN
1...Qxb2 2.Rb1 Qa2 3.Ra1 Qc4 4.Qd2 Qb3 5.Nc1 Qb6 6.Bd3 cxd4 7.Nxd4 Nc5
  µ  (-0.78)   Depth: 11/33   00:00:17  6444kN
1...Qxb2 2.Rb1 Qa2 3.Ra1 Qc4 4.Qd2 Qa6 5.dxc5 Nxc5 6.Ned4 Qb6 7.c4 Rd8
  µ  (-0.78)   Depth: 12/41   00:00:56  22241kN
1...Qxb2 2.Rb1 Qa2 3.Ra1 Qc4 4.Ng3 Qxc3+ 5.Bd2 Qb2 6.Rb1
  µ  (-0.78)   Depth: 13/38   00:01:18  30883kN
1...Qxb2--
  ³  (-0.50)   Depth: 14/31   00:01:44  41729kN
1...Qxb2 2.Rb1 Qa2 3.Ra1 Qc4 4.Ng3 Qxc3+ 5.Bd2 Qb2 6.Rb1 Qa3 7.Ra1 Qb2
  =  (0.00)   Depth: 14/47   00:01:52  45296kN

Uri



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