Author: Renze Steenhuisen
Date: 08:02:13 03/17/04
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On March 17, 2004 at 05:26:50, milix wrote: >On March 17, 2004 at 04:58:06, Peter Alloysius wrote: > >>what are tricks for evaluation tuning so that it could >>search less nodes? >> >>i noted that my engine use exactly same move ordering scheme as >>crafty but it still search much more nodes. >>my engine also use adaptive null move, and futility pruning. >> >>so i think the problem is on evaluation tuning. >>i heard that tuning evaluation function can reduces node searched, >>so what's the trick? > >I think that there is no special trick. A bad evaluation will missguide the >search. When I turn off the positional evaluation (and have only material+piece >square scores) my engine is doing too many researches and the move ordering is >also very bad. Same effect if I alter a positinal characteristic too much, like >giving a very big bonus in advanced pawns or penalize bad king safety too much. If you turn positional evaluation off, what are typical numbers for move-ordering? Because this is exactly what I do for now, but the History Heuristic nor Killer Heuristic don't give very nice move-ordering %'s! Thanks! Renze
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