Author: Andrew Williams
Date: 23:12:08 12/16/03
Go up one level in this thread
On December 16, 2003 at 21:22:56, Anthony Cozzie wrote: >Recently I experimented with adding MTD(F) into Zappa. It has been an >interesting experiment, but I am going back to PVS(). > >I thought that since Zappa has a [UL,LL] paired transposition table and an >evaluation granularity of only 1/100 of a pawn, MTD(f) would work quite well, >but that does not seem to be the case. The MTD(f) version of Zappa does >slightly better on test suites (113/183 @ecmgcp v 106 @ 10s/move) but in the >positional test suites it averaged about 3/4 of a ply less than the PVS() >version. My guess is that because MTD(F) tries all moves, some of the >"ridiculously losing captures" ordered near the end by PVS() are tried earlier, >which accounts for the increased test suite performance. > I don't understand the last part of this paragraph. Why would "ridiculously losing captures" be tried earlier (than what?) in MTD? >If anyone has any suggestions, I'm keeping the MTD(F) code in Zappa (just turned >off) and I'm willing to try anything. > >anthony Andrew
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.