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Subject: Re: Test your passed-pawn evaluation function!

Author: Volker Böhm

Date: 15:40:27 01/13/04

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IceSpell0_015: (a not yet published engine written in the last months)

I extends depth when a pawn gets on the 7-th row by 0.75 ply. Thus every 4
extensions I´ll miss one extra ply. Usually I start with the first, giving me
Rxe7 at depth=14 within 6 Minutes but changes back to Be5 at depth=15. (1,3 GHZ
Celeron)

I changed the engine a little bit to miss the second extension (not the first):

11   00:16 -0,53   Bb2e5 Ra7b7
11   00:16 -0,53   Bb2e5 Ra7b7
11   00:23 -0,52   Bb2e5 Ra7a8 c5c6
12   00:51 -0,55   Bb2e5 f5f4 Rh7h4 Bg6f5 Rh4h5 Bf5xe6
13   01:37 -0,39   Bb2e5 f5f4 Rh7h2 Ra7a5 Be5xf4 Ra5xc5
14   06:24 -0,10   Rh7xe7 Kd8xe7 d5d6+ Ke7d8 Bb2f6+ Kd8c8
15   13:48 -0,10   Rh7xe7 Kd8xe7 d5d6+ Ke7d8 c5c6 Bg6e8

Now changed to miss the third extension (doing the first and second):

11   00:19 -0,62   Bb2e5 Ra7b7 c5c6 Rb7b5 c6c7+ Kd8c8
12   00:51 -0,55   Bb2e5 f5f4 Rh7h4 Bg6f5 Rh4h5 Bf5xe6
13   01:54 -0,38   Bb2e5 f5f4 Rh7h2 Ra7a5 Rh2b2 Ra5xc5
14   08:05 -0,10   Rh7xe7 Kd8xe7 d5d6+ Ke7d8 c5c6 Bg6e8
15   18:00 -0,10   Rh7xe7 Kd8xe7 d5d6+ Ke7d8 c5c6 Bg6e8

Greetings Mangar






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