Author: Stuart Cracraft
Date: 11:41:45 07/06/04
Go up one level in this thread
On July 06, 2004 at 14:16:37, Robert Hyatt wrote: >On July 06, 2004 at 14:09:39, Stuart Cracraft wrote: > >>Okay here's a new table with revisions based >>on input. Now, higher effort and return numbers >>mean more effort and return. And gone is the >>value number replaced with Russell's return/effort >>ratio. Have revised some numbers to try to fit in >>with some opinions. >> >>The higher the third column the more that feature >>gives in program performance for less work expended. >> >>EFFORT RETURN RETURN/EFFORT Feature >>1 5 5 capture ordering >>3 4 1.33 null move >>4 4 1 null move with verification >>4 4 1 search pv first >>4 5 1.25 static exchange evaluator > >This can make a big difference. IE once you have a SEE procedure working, you >can use it to reduce the size of the q-search by over 50%, doubling your search >speed instantly. At very low risk. > > > >>4 5 1.25 transposition table >>4 5 1.25 transposition table with 2-tier replacement >>3 3 1 history heuristic, killers, other ordering >>2 1 .5 aspiration >>2 2 1 iterative deepening >>2 2 1 pawn hashing w/ complex pawn evaluation >>3 2 .66 capture extension >>1 5 5 check extension >>1 1 1 pawn to 6th/7th extension >>3 3 1 futility >>3 2 .66 razoring >>5 3 .6 mate-at-a-glance To reflect this, I've upped return values. They can go higher than 5 now and SEE gets a 6. A few more revisions elsewhere as well. EFFORT RETURN RETURN/EFFORT Feature 1 10 10 capture ordering 3 4 1.33 null move 4 4 1 null move with verification 4 4 1 search pv first 2 1 .5 fractional extensions 4 6 1.5 static exchange evaluator 4 5 1.25 transposition table 4 5 1.25 transposition table with 2-tier repl. 3 3 1 history heuristic, killers, other ordering 2 1 .5 aspiration 4 5 1.25 book learning 3 3 1 position learning 2 2 1 iterative deepening 3 1 .33 internal iterative deepening 2 2 1 pawn hashing w/ complex pawn evaluation 3 3 1 king+pawn hashing w/ king safety evaluation 3 2 .66 capture extension 1 5 5 check extension 1 1 1 pawn to 6th/7th extension 3 3 1 futility 3 2 .66 razoring 5 3 .6 mate-at-a-glance Stuart
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