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Subject: Re: Crash and burn on this position -- some commercial programs don't get it

Author: Uri Blass

Date: 01:51:35 12/12/01

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On December 12, 2001 at 04:37:05, Gian-Carlo Pascutto wrote:

>On December 12, 2001 at 04:25:13, Dann Corbit wrote:
>
>>I think something
>>is getting null move pruned or whatever by some of the programs.  Bxe4 is a
>>loser.
>
>I would second that notion. Watch what happens when
>Pepito switches away.

I do not have pepito but here is Deep Fritz without null move pruning after Bxe4
p800(48 mbytes hash)
New position
[D]5rk1/ppq4p/3b2p1/1b1p1p2/3PB3/2P2QP1/P2B1P1P/R3R1K1 b - - 0 1

Analysis by Deep Fritz(selectivity=0):

1...fxe4!
  +-  (4.06)   Depth: 1/2   00:00:00
1...fxe4!
  =  (0.22)   Depth: 1/2   00:00:00
1...fxe4 2.Qe3
  ²  (0.28)   Depth: 2/5   00:00:00
1...fxe4 2.Qe3 Bc4
  =  (0.09)   Depth: 3/6   00:00:00
1...fxe4 2.Qg4 Bc4 3.Bg5
  =  (0.09)   Depth: 4/10   00:00:00  1kN
1...fxe4 2.Qg4 Bc4 3.Re3 Qf7
  =  (0.06)   Depth: 5/12   00:00:00  10kN
1...fxe4 2.Qg4 Bc4 3.Bh6 Rf6 4.Bg5
  =  (0.09)   Depth: 6/14   00:00:00  38kN
1...fxe4 2.Qg4 Bc4 3.Bh6 Rf6 4.Re3 b5
  =  (0.09)   Depth: 7/17   00:00:00  190kN
1...fxe4 2.Qg4 Kg7 3.Qh3 Rf5 4.Qh6+ Kg8 5.Qe3 Bc4
  =  (0.09)   Depth: 8/22   00:00:01  875kN
1...fxe4 2.Qg4 Bc4 3.a4 b6 4.Rab1 Kg7 5.Re3 h6
  =  (0.00)   Depth: 9/27   00:00:08  4253kN
1...fxe4 2.Qg4 Bc4 3.a4 Qf7 4.Be3 Qc7 5.a5 Rf3
  =  (0.00)   Depth: 10/26   00:00:32  16703kN
1...fxe4 2.Qg4 Bc4 3.a4 Kg7 4.a5 Rf5 5.Rab1 Rf7 6.Qe6
  =  (0.00)   Depth: 11/31   00:02:08  66123kN

(Blass, Tel-aviv 12.12.2001)

I do not know pepito score but it is possible that the evaluation is positional.
I want to know if pepito can beat one of the commercial with black after 1.Bxe4

Uri



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