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Subject: Re: Huge Bug in Fritz 9 (Engine)

Author: Rick Hagen

Date: 13:52:25 10/18/05

Go up one level in this thread


On October 18, 2005 at 16:34:53, Rick Hagen wrote:

>On October 18, 2005 at 16:29:07, chandler yergin wrote:
>
>>On October 18, 2005 at 16:24:25, Rick Hagen wrote:
>>
>>>On October 18, 2005 at 16:15:01, chandler yergin wrote:
>>>
>>>>  Of course no good probram or bad program would choose that move.
>>>>Ne5 is 4th choice. Only if that was the PV the engine was lookng at when the
>>>>time allocation software made it move.
>>>
>>>The problem is that in MultiPV it_will_change its first move to Kg8 after a
>>>while... but its eval is almost the same to Ne5! (-0.4x something)
>>
>>No it's not.. let the engine run for a few seconds.
>
>I let it run for 20 seconds.
>Should be time enough to find it gives a piece away no?
>Maybe I should run it for 1 hour?
>
>But I will run it in MultiPV mode untill it sees a clear difference, and I will
>post the time okay?
>
>Rick

After 13(!) minutes:
P4 3.0Ghz
HT=128MB
TBs off

New game, Blitz:5' Netherlands
1n1r3k/1p1n4/2p5/8/3B4/8/4K3/R7 b - - 0 1

Analysis by Fritz 9:

1. ³ (-0.48): 1...Ne5 2.Bxe5+ Kh7 3.Ra7 Nd7 4.Rxb7 Kg6 5.Bd4 Nf6 6.Bxf6 Kxf6
2. ³ (-0.48): 1...Kg8 2.Rg1+ Kf7 3.Rf1+ Ke6 4.Rb1 b5 5.Ba1 Ne5 6.Rb3 Nd3 7.Rc3
c5 8.Ke3 c4
3. ³ (-0.46): 1...Kh7 2.Bc3 b5 3.Rb1 Kg6 4.Kd2 Nf6+ 5.Kc2 Nd5 6.Rg1+ Kf5 7.Be1
Ne3+ 8.Kb3 Rd3+ 9.Kb2

Maybe I should give it a day to see something isn't okay in its eval...
Or it sees something we don't?
Or you're in denial?
Or you're just trolling?

Rick
(will email chessbase about this bug)




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