Author: David B Weller
Date: 04:45:37 02/15/06
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'
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