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Subject: Re: Hard test position for chess programs( Steve Ham-Nimzo7.32)

Author: blass uri

Date: 09:44:21 06/17/00

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On June 17, 2000 at 12:37:39, Jeff Lischer wrote:

>On June 16, 2000 at 19:44:14, Hans Gerber wrote:
>
>>On June 16, 2000 at 18:18:25, Ed Schröder wrote:
>>
>>>On June 16, 2000 at 14:44:39, blass uri wrote:
>>>
>>>>[D]2rr4/1b1n1k2/3Bp3/pp4p1/2pPPp2/P4P2/1PB2KP1/R4R2 b - - 0 1
>>>>
>>>>The test is to avoid c3 that is not good because of b4.
>>>>
>>>>Nimzo7.32 failed and played c3 after 18 hours and now some moves after c3 it had
>>>>to admit that Ham has more than 1 pawn advantage.
>>>>
>>>>I am interested in the results of other chess programs.
>>>>
>
><snipped>
>
>>>Rebel Century 2.0 (beta) running under EPD2DIAG plays 1..Nb6 after 2:59
>>>but the score compared to 1..c3 is pretty small.
>>>
>>>00:11  10.00  -0.17  1..c3 2.b4 Rc4 3.bxa5 Nb8 4.Rh1 Rxd4 5.Rh7+ Kg6 6.Rxb7 Rd2+
>>>00:18  10.02  -0.13  1..Nf6 2.e5 Nd5 3.Rh1 Rh8 4.Rxh8 Rxh8 5.Be4 Rh2 6.Rc1 Bc6
>>>00:32  11.00  -0.13  1..Nf6 2.e5 c3 3.bxc3 Ne8 4.Rac1 Nxd6 5.exd6 Rxd6 6.Rh1 Bd5
>>>7.Rh7+ Kf6
>>>00:39  11.01  -0.08  1..c3 2.b4 Nb6 3.Bc5 Nd7 4.Rfd1 Nxc5 5.bxc5 Kg6 6.Rab1
>>>01:02  12.00  -0.11  1..c3 2.b4 Nb6 3.Bc5 Nd7 4.Rad1 Nxc5 5.bxc5 Rh8 6.Rh1 Bc6
>>>02:17  13.00  -0.13  1..c3 2.b4 Rc4 3.Rad1 Nf6 4.Bc5 Nd7 5.Rh1 Nxc5 6.dxc5 Rxd1
>>>7.Rxd1 Ke7 8.Rh1 g4
>>>02:59  13.04  -0.10  1..Nb6 2.e5 c3 3.bxc3 Nc4 4.Rac1 Nxd6 5.exd6+ Rxd6 6.Rh1
>>>Ba6 7.Bd3
>>>04:30  14.00  -0.11  1..Nb6 2.e5 c3 3.bxc3 Nc4 4.Rac1 Nxd6 5.exd6 Rxd6 6.Rh1 Ba6
>>>7.Rh7
>>>11:55  15.00  -0.07  1..Nb6 2.e5 Nd5 3.Rh1 Rh8 4.Be4
>>>
>>>PC: Ahtlon 600, 60 MB hash table.
>>>
>>>Ed
>>
>>Ok, I play 2. Bc5, and now what does REBEL CENTURY do? Nd7 again? Then I play
>>Bd6. Perhaps you give me please the line if REBEL does now plan c3 again? Or a
>>draw?
>>
>>
>>Hans Gerber
>
>Here's what I get with an overnight analysis using Rebel Century 1.2
>(Anti-GM=Strong, PC: PIII 600, 60 MB hash table):

I remember that Ed claims that it is not a good idea to use anti-GM=strong with
analysis.

I found that Rebel can avoid c3 also without anti-GM.

Uri



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