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Subject: Re: Rare fact Rybka lost from 3.14 advantage

Author: George Tsavdaris

Date: 16:07:49 01/30/06

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On January 30, 2006 at 17:48:59, Uri Blass wrote:

>On January 30, 2006 at 13:09:20, Robert Hyatt wrote:
>
>>The only thing I hope you won't see is a + mate score and then white loses.  :)
>
>Even this can happen as long as rybka does not consider underpromotions.
>

Correct.....

Here is one:
[D]5k2/5p2/2p2Bp1/1pppRB2/2bb2Q1/5Pq1/2PK1p2/8 w - - 0 1

Rybka 13b:
1.Qg4xg3
  +-  (18.23)   Depth: 3   00:00:00
1.Qg4xg3
  +-  (310.00)   Depth: 4   00:00:00
1.Qg4xg3 Bd4-c3+
  +-  (310.00)   Depth: 4   00:00:00


Fritz 8:
1.Qg4xg3 f2-f1N+ 2.Kd2-e1 Nf1xg3 3.Bf5-d7 Bd4xe5 4.Bf6xe5 Kf8-e7
  -+  (-3.49)   Depth: 12/25   00:00:01  1867kN
1.Qg4xg3 f2-f1N+ 2.Kd2-e1 Nf1xg3 3.Bf5-d7 Bd4xe5 4.Bf6xe5 Kf8-e7
  -+  (-3.49)   Depth: 13/27   00:00:02  3496kN
1.Qg4xg3 f2-f1N+ 2.Kd2-e1 Nf1xg3 3.Bf5-d7 Bd4xe5 4.Bf6xe5 Kf8-e7
  -+  (-3.49)   Depth: 14/28   00:00:05  7371kN

 But all these are of course some meaningless situations, since Rybka is still
beta and finally it would support underpromotions and make us stop fooling
around with her.....:-)



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