Author: Bruce Moreland
Date: 20:15:38 07/29/03
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On July 29, 2003 at 21:11:23, Mathieu Pagé wrote: >Hi, > >I have this question about iterative deepening: > >When I have search a position at, let say, 8 ply and i had searched half of the >moves at ply 9 and none of those move return a better score than the best move >at 8 ply wich move should I choose ? The best at ply 8 or the best at ply 9 even >if I have not search all moves ? > >someone have an hint ? > >Thanks for your help. > >Mathieu Pagé Moves at ply 9 are not in competition with moves at ply 8. When you search all of ply 8, you know what the best move is at ply 8, so if your time runs out here, you make the best ply 8 move. When you start ply 9, your search can end before you finish searching the first move in ply 9. If this happens, you make the best move from ply 8. If you've finished one or more moves in ply 9, you make the one of those with the best score. If something weird happens, like the first move in ply 9 returns a hugely low score, you might want to search more moves, even if your time management system thinks you really should move now. It's better to think a little longer than it is to walk into a loss. bruce
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