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Subject: Re: Chess Engine evaluation question

Author: Les Fernandez

Date: 23:28:19 11/30/03

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On December 01, 2003 at 01:49:28, Russell Reagan wrote:

>On December 01, 2003 at 00:35:26, Les Fernandez wrote:
>
>>Anyone have any idea what the percentage is for a chess engine after say 90 sec
>>of analysis that one of the top 5 suggested moves is in fact the best move?  And
>>what percent of the time would you guess that after an additional 90 sec that an
>>alternate move is found and that it was not one of the top 5 choices after the
>>first 90 seconds?  And finally can crafty when it is done with its analysis
>>report the top 5 highest rated moves and if not what engine can do that?
>
>You might try Arena (www.playwitharena.com). It can do a multi-pv mode for
>engines that support it. Ruffian UCI can do it. Here is a sample output of the
>analysis of the opening position, with the top 5 moves according to Ruffian for
>depths 9, 10, and 11. The output is upside down (best move on bottom). Maybe you
>can use this to find the answer to your question.
>
>Ruffian_105  UCI 118 MB:
>---------------------------------------------------------------------------
> 9   00:01 -0.08   Nf3 Nf6 d4 d5 c4 dxc4 Qa4+ Bd7 Qxc4 Nc6
> 9   00:01 -0.06   e3 Nc6 Nf3 d5 Bb5 a6 Bxc6+ bxc6 Ne5 Bd7 0-0
> 9   00:01 -0.01   Nc3 d5 d4 Bf5 Bf4 Nf6 Nb5 Na6 Nf3
> 9   00:01 -0.01   d4 Nf6 Nc3 d5 Bf4 Bf5 Nb5 Na6 Nf3
> 9   00:01  0.01   e4 e6 Nc3 Bb4 a3 Bd6 d4 Nc6 Nb5 Be7 Qh5
>---------------------------------------------------------------------------
>10   00:06 -0.20   e3 Nf6 Nf3 e6 Nc3 Nc6 Bb5 Bb4 0-0 0-0
>10   00:06 -0.17   Nf3 Nf6 Nc3 d5 d4 Bf5 Bf4 Nc6 Nb5 Rc8
>10   00:06 -0.15   Nc3 d5 d4 Bf5 Bf4 Nc6 e3 Nf6 Bd3 Bg4
>10   00:06 -0.15   d4 Nf6 Nc3 d5 f3 Bf5 g4 Bg6 g5 Nh5
>10   00:06  0.01   e4 e6 Nc3 Bb4 a3 Bd6 d4 Nc6 Nb5 Be7 Qh5
>---------------------------------------------------------------------------
>11   00:16 -0.10   e3 Nf6 Nf3 Nc6 Nc3 d5 Be2 Ne4 0-0 Nxc3 dxc3 Bf5
>11   00:16 -0.04   Nf3 Nf6 Nc3 d5 d4 Nc6 Bf4 Nh5 Bg5 f6 Be3
>11   00:16 -0.04   Nc3 d5 d4 Nf6 Nf3 Nc6 Bf4 Nh5 Bg5 f6 Be3
>11   00:16 -0.04   d4 Nf6 Nc3 d5 Nf3 Nc6 Bf4 Nh5 Bg5 f6 Be3
>11   00:16  0.05   e4 e6 d4 Nf6 e5 Nd5 c4 Nb6 Nc3 d5 cxd5 Nxd5 Nxd5 Qxd5

Hi Russel,

I think that is what I am looking for.  I assume the 00:16 is 16 seconds.  Is
ruffian available for download?

One more thing, if you read this again, can you provide me with a similar print
out but for a 3 min interval?

Thanks,

Les



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