Author: Peter Kappler
Date: 10:11:43 11/21/03
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On November 21, 2003 at 12:11:04, Georg v. Zimmermann wrote: >Hi, > >the following is a position I found in one of Sunsetter's search tree leef >nodes. > >[D]r2qkb1r/ppp1pppp/2n5/4pb2/Q1P5/N7/PP3PPP/R1B1KBNR w KQkq - 0 9 > > >Of course it sees that black is lost, but due to the eval() still being bad >beyond reason, even though I spend a couple of days on it now, it doesnt see >that its already 1-0. > >One of the reasons for that is that it thinks the Qa4 of white is worse than the >Qd8 of black, which is of course absurd. White queen is active, can not be >attacked. Black queen is passive, and doesnt know where to go after Rd1 soon. >Right now I just use a piece square table for the queen with some big penalties >to avoid it move around with the queen too much in early opening. > >How does one achieve both ? >- avoid too much queen movement in the early middlegame >- not make it think the white queen here is bad > > >Georg Try disabling the PST penalty for the queen. As long as you evaluate other terms like piece development and central control, you search should easily be able to identify bad variations with too many queen moves. -Peter
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