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

Author: chandler yergin

Date: 23:25:05 10/18/05

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On October 19, 2005 at 02:14:18, Rick Hagen wrote:

>On October 19, 2005 at 01:58:18, Uri Blass wrote:
>
>>On October 19, 2005 at 01:52:54, chandler yergin wrote:
>>
>[...]
>
>>>>>Analysis by Fritz 5.32:
>>>>>
>>>>>1. -+ (-4.69): 1...Kg8 2.Rh1 Re8+ 3.Kd3 Ne5+ 4.Bxe5 Rxe5 5.Ra1 Rd5+ 6.Kc2
>>>>>2. -+ (-4.63): 1...Kh7 2.Rh1+ Kg6 3.Rh8 Nf8 4.Bb6 Re8+ 5.Kd3 Nbd7 6.Bc7
>>>>>3. ยต (-0.97): 1...Ne5 2.Bxe5+ Kg8 3.Ra8 Re8 4.Kd3 Rxe5 5.Rxb8+ Kf7 6.Rxb7+
>>>>>
>>>>>(, MyTown 18.10.2005)
>>>>
>>>>This only proves that Fritz5.32 does not have the bug.
>>>
>>>All the Fritz engines work the same way.. Shredder included.
>>
>>They use similiar algorithm but evaluation is different.
>>The bug seems to be bug in the evaluation of Fritz9 and not bug in the
>>evaluation of other engines.
>>
>>>
>>>>The bug is specific for Fritz9 engine that fails to evaluate Kg8 or Kh7 as -+
>>>
>>>You have a 'user' that has a complaint, out of how many millions that use
>>>this product?
>>>
>>>>
>>>>Uri
>>>        The Fritz9 Engines per se.. do not have this bug. I explained how
>>>and what this problem is. Also how to correct it.
>>
>>Can you show me analysis with Fritz9 that show more than +3 pawns for black in
>>the relevant position or even more than +1 for black?
>
>He doesn't have Fritz 9, so he can't I'm afraid.
>And (his words, paraphrased), "it's not a Fritz 9 bug, it's a user error"...
>We Fritz 9 users don't know how to analyse a position correctly!

http://www.talkchess.com/forums/1/message.html?456576

>
>
>>
>>Of course you can do it with Fritz5.32 because Fritz5.32 does not have the bug
>
>And Fritz 8 and Shredder 9 and Fruit x.x and...
>
>>
>>Uri
>
>Rick



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