Author: Robert Hyatt
Date: 11:52:36 03/11/04
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On March 11, 2004 at 14:36:21, Tord Romstad wrote: >On March 11, 2004 at 14:31:50, Robert Hyatt wrote: > >>On March 11, 2004 at 13:05:35, Eugene Nalimov wrote: >> >>>You can try it only if depth remaining is large enough. This way you will not >>>see significant slowdown, but probably will get better move ordering near the >>>root. >> >>I tried that. And it didn't help. The speed loss dropped, but so did the >>effectiveness of the idea. Several reported good results in checkers. I've not >>seen anyone really "glow" about ETC in chess, however... > >I'm glowing. :-) > >It seems to me that ETC is much more effective in an MTD(f) search than >in a PVS search. I think most MTDers use ETC. > >Another important factor might be the speed of the engine. It makes >sense that a sub-200 kN/s-engine like mine will benefit more from ETC >than a fast engine like yours. > >Tord That isn't a surprise... mtd researches the same depth multiple times. I could see how that would mate well with ETC. I really wasn't thinking about mtd when I responded, obviously... But you provided another important data point to remember...
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