Author: Uri Blass
Date: 03:56:31 06/07/05
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On June 07, 2005 at 04:23:07, Kolss wrote: >On June 07, 2005 at 02:09:56, Uri Blass wrote: > >>2)I do not believe that hydra's hardware give hydra advantage that is equivalent >>to being more than 10 times faster. > > >Hello Uri, > >At the last IPCCC (Feb. 2005) I had the (dubious?!) pleasure to play Hydra (the >16-way version) with Ikarus. Ikarus was running on a Centrino 2.0 GHz which is >approximately equivalent in terms of speed to an "Athlon 3800+". We (i.e. >Chrilly, Christopher (Lutz) and I) discovered that Hydra plies seemed to be more >or less equal to Ikarus plies with respect to what is seen (i.e. tactical >horizon). Hydra was reaching three, sometimes four more plies than Ikarus: >Ikarus would play a move that Hydra had not expected, Hydra's evaluation would >jump up, and Ikarus would need one more move to see that it had been bad; or >Hydra would expect a move with a good score (for itself, of course), Ikarus >would "plan" something different with OK evaluation, then after two or three >minutes it would fail low, see what was wrong and eventually change to the move >expected by Hydra; in gereral, Ikarus would more or less show the evaluation >that Hydra had had two moves earlier in the game. > >Three to four plies (very) roughly translates into a factor of 20 (+- perhaps 5) >with an average effective braching factor. Thanks for the information but it does not prove nothing because Hydra may have better software than Ikarus. Uri
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