Author: Antonio Dieguez
Date: 12:28:00 08/19/01
Go up one level in this thread
On August 19, 2001 at 03:44:20, Rémi Coulom wrote: >On August 18, 2001 at 21:11:00, Stuart Cracraft wrote: > >>So I've been dinkering with null move. Or it's been dinkering >>with me. >> >>Without using null move, an 8-ply search in the opening >>position looked like: >> >>ply time nodes score pv >> 1 0.00 21 28 d2d4 >> 2 0.00 97 -20 d2d4 d7d5 -20 centipawns in this symetrical position? >> 3 0.06 842 16 d2d4 d7d5 g1f3 >> 4 0.06 3423 -15 e2e4 g8f6 e4e5 f6e4 > >From this +/- oscillation of the score, I guess that you do not give a big >enough bonus for being on the move. This what kills your null move. Just add a >bonus for the player on the move so that the evaluation oscillates as little as >possible. Null move should work much better then. > >Rémi Interesting that you use a bonus. Anyway in this particular position, my guess (just my guess) would be that if r=3 is used, a bonus would be no good for nullmove, as nullmoving steal an important tempo for the side to move.
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