Author: Ernst A. Heinz
Date: 11:27:45 03/22/00
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Hi Andrei, >In my chess program Freyr I've used simple alpha beta from the start, each time >I tried to change it to pvs/negascout it didn't work as expected because it >just generated too many nodes. Does anyone else experienced this behavior ? >Is there a logical explanation for this ? PVS requires good move ordering to work well. Otherwise, the frequent researches kill its performance. Assuming that your PVS implementation is okay, I would conjecture that your move ordering represents the limiting factor here. =Ernst= P.S. Beside many other publications, the first chapter of my new book "Scalable Search in Computer Chess" (http://supertech.lcs.mit.edu/~heinz/node1.html) contains more details about these subjects.
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