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Subject: Re: How to read Rybka mates score in Arena

Author: F. Huber

Date: 04:52:43 01/24/06

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On January 23, 2006 at 22:52:06, Mike Byrne wrote:

>Add 5 and divide by 10, e.g.,
>
>(using one of Ed's positions from the past)
>
>FEN: [d]1r4r1/3q1npk/2b1pbnp/Rp1p4/1N1P3P/2PQ1pP1/1K3B2/5B1R w - - 0 1
>
>
>Rybka 1.01 Beta 12:
>   3	00:01	       3.200	0	-0.90	1.h5
>   4	00:01	       4.832	0	-0.90	1.h5
>   5	00:01	       7.392	0	-0.86	1.h5 Kh8
>   6	00:01	      11.091	51.859	-1.10	1.h5 Ng5 2.hxg6+ Kh8 3.Ra6
>   7	00:01	      22.120	60.241	-1.19	1.h5 Ng5 2.hxg6+ Kh8 3.Ra6 Rgc8
>   8	00:02	      54.108	63.249	-1.23	1.h5 Ng5 2.hxg6+ Kh8 3.Ra6 Rgc8 4.Qe3
>   9	00:03	     153.392	66.108	-1.38	1.h5 Ng5 2.hxg6+ Kh8 3.Ra6 Rgc8 4.Qe3 Bb7
>  10	00:06	     365.537	66.355	-1.51	1.h5 Ng5 2.hxg6+ Kh8 3.Ra6 Rgc8 4.Qe3 Bb7
>5.Ra5
>  11	00:12	     766.014	66.575	-1.22	1.h5 Ng5 2.hxg6+ Kh8 3.Be3 Ra8 4.Rxa8 Rxa8
>5.Bxg5 Bxg5 6.Qxf3 Qc8
>  12	00:23	   1.451.115	67.829	-1.37	1.h5 Ng5 2.hxg6+ Kh8 3.Be3 Ra8 4.Rxa8 Rxa8
>5.Bxg5 Bxg5 6.Qxf3 Qa7 7.Bd3
>  12	00:27	   1.733.658	66.754	+M145	1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+
>Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Ra8
>
>
>M145 == Mate in 15,

Hello Mike (might be interesting also fpr Vasik!),

Rybka sends mate values from 32000 +/- mate, which gives 320 centipawns.
Of course this is absolutely non-standard, and so Arena mis-interpretes such
values.

But since Rybka is an UCI engine, the most simple way to report a mate to the
GUI would be to send back ´score mate <n>´ in the usual info string -
I´ve really no idea, why Vasik has choosen this strange 32000+/-n ?

Regards,
Franz.



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