Author: Vasik Rajlich
Date: 06:58:30 02/15/06
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On February 15, 2006 at 07:45:37, David B Weller wrote: >I am a broken man ... > >I have been searching in vain for the reason(s) that my engine searches so >slowly compared to others... > >1/5 the NPS >5 ply less > >NPS and depth is still < Gerbil even when using a rediculously simple SE of >material ONLY > >using: > >AlphaBeta fail soft with Aspiration=30 and PVS >Null Move R=2 (no verification) >Futility Pruning at Frontier >Delta Pruning in Quies >Low History Reduction [late in move list] >*not using IID. It does not help > >Extensions: >Check >One Reply >Mate threat >Pawn to 7th > >extension are UNLIMITED >[tried several extension limiting schemes with little difference] > >Move order: >ETC [used only when in check] >HASH >PV >MATE KILLER >MVV/LVA >KILLERS (2) >HISTORY > >Static eval is about half way between Gerbil and Crafty [in complexity] > >I have profiled the code, and there is nothing abnormal. Spends most time in >eval. [IIRC 30+ %] > >Estimated average branching factor is 2.4 [tested on positional suite] >*maybe higher in games > >please help. About to go 'stark raving mad' Another wild guess: are you compiling properly? BTW - ETC only after checks is an interesting idea. Where did you get it? Vas
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