Author: Will Singleton
Date: 11:53:27 12/01/03
Go up one level in this thread
On December 01, 2003 at 13:33:57, Tord Romstad wrote: >On December 01, 2003 at 09:38:18, Anthony Cozzie wrote: > >>Well Zappa is currently a bitboard based engine, and I was considering >>switching. Zappa's nps (in a lazy-eval position like WAC141) went from 550 -> >>350 using these tables. > >Gothmog gets 190 knps in WAC141 on a PIV 2.4GHz. I cannot use lazy eval, >though. Unfortunately it is hard to estimate how much of the processor time is >spent on >attack table generation, because the attack table generation is very intertwined >with the rest of my evaluation code. > >>The big problem I had was that the bitboard code will be considerably faster once >>I get an Opteron, while the attack table code will stay slow. > >My code will always stay slow, I'm afraid. And bitboards are simply not an >option for me -- being a non-programmer with limited time on my hands I have >simply no hope to ever acquire the skills needed to make them work. > >Tord Why can't you use lazy eval? I thought that one of the benefits to evaluating at every node is to enable a smaller lazy-eval window. Will
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