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Subject: Re: Small Bug in Chest UCI

Author: Heiner Marxen

Date: 07:54:21 05/24/04

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On May 24, 2004 at 10:15:34, F. Huber wrote:

>On May 24, 2004 at 09:53:58, Heiner Marxen wrote:
>
>>On May 23, 2004 at 18:24:40, Drexel,Michael wrote:
>>
>>>[D] 2rq1k1r/2pb1p2/3p2p1/3Pp3/4P3/2N1QpP1/PPP2P2/R4RK1 b - - 0 19
>>>
>>>New game,
>>>2rq1k1r/2pb1p2/3p2p1/3Pp3/4P3/2N1QpP1/PPP2P2/R4RK1 b - - 0 1
>>>
>>>Analysis by ChestUCI Ver.3.5:
>>>
>>>19...Qf6
>>>  -+  (-#6)   Depth: 6   00:00:11  2404kN
>>>19...Qf6 20.Qh6+ Rxh6 21.Rab1 Qh8 22.a3 Rh1#
>>>  -+  (-#6)   Depth: 6/6   00:00:11  4103kN
>>>
>>>The mainline is a mate in 4.
>>
>>Yes, that is incorrect, 20.Qh6+ is inferior.  Neither Chest 3.19 nor my
>>current development version exhibit this bug:
>>
>>2rq1k1r/2pb1p2/3p2p1/3Pp3/4P3/2N1QpP1/PPP2P2/R4RK1 b - - acn 4103219; acs 17; bm
>> Qf6; ce 32756; dm 6; pv Qf6 Na4 Bh3 Qh6+ Rxh6 Nb6 cxb6 g4 Bg2 g5 Rh1#;
>>
>>Franz?  Any idea what's going on?
>>
>>>Michael
>>
>>Thanks for pointing out!
>>
>>Cheers
>>Heiner
>
>Hello Heiner!
>
>I´ve already ´analyzed´ the whole day long ... :-(
>
>Detailed email already on the way to you ... ;-)

Ah, just saw the email... I can explain the effect... detailed email
will follow in a few minutes.

>Best regards,
>Franz.

Cheers,
Heiner



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