Author: Peter McKenzie
Date: 21:02:37 10/30/99
Go up one level in this thread
On October 30, 1999 at 17:52:02, Christophe Theron wrote: >On October 30, 1999 at 08:22:00, Enrique Irazoqui wrote: > >>I have played 2 matches at game/5 between Tiger 12.0 and Crafty 16.18 as an >>engine for Fritz. You played crafty under Fritz? Not a great start for a 'scientific' experiment. >> >>Crafty played on a PIII-500, 64MB hashtables, the Nalimov tablebases that come >>with Fritz and the General book of Fritz 5 built after games of 2500+ players. >> >>Tiger 12.0 played on a PII-300, 32MB hashtables and the small book of Tiger 11.7 >>with only 35000 positions. > >Oops... Not exactly. > >This book indeed comes from the first versions of Tiger 11.x but it contains >only 7682 moves. > >This is 35 times smaller than the current book provided with Tiger 12.0. > > > >> I used this book to compensate for Crafty not using >>its own. It was not uncommon to see Tiger out of book after 2, 3 or 4 moves. I >>don't think that the book gave Tiger any kind of advantage. >> >>In the first match, Tiger won 25-13, +19 -7 =12, scoring 65.7% > >Wow! What elo rating difference would that mean? > > > >>The second match was played under the same conditions, except that Tiger had PB >>off. In this second match, Tiger won 23-21, +16 -14 =14, scoring 52.2%. >> >>Going back to the discussion of a few weeks ago about PB on/off, these 2 matches >>seem to indicate that PB off is not more detrimental than what could be expected >>by just not using the usual 50% of the opponent's time. >> >>The delay in transmitting the moves through auto232 is almost 3 seconds/move for >>the dos driver and about 2/10 for the windows driver. Considering that the >>average in these matches is 79 moves/game, each game lasted 14 minutes instead >>of 10. Assuming that both programs guessed 50% of the opponent's moves, Tiger >>and Crafty used 9.5 minutes/game (5 + 4.5) each with PB on, while in the second >>match Tiger used 5 minutes/game. It is as if Tiger would have played the first >>match on a P300 and the second on a P150. All this mess (sorry) makes the >>results of both matches quite coherent. >> >>I tried all this PB on/off thing in a different way. Didzis plays with 2 >>programs on one machine and PB off. I replayed with 2 machines one of his games >>Tiger-CM6K and both programs played the same moves. >> >>So it seems that for some programs playing with PB off has no other effect than >>having less time to compute. > > >Also it seems that a crippled Tiger is still better than a full strength Crafty >(PII-300/small book against PIII-500). > >And it seems that a crippled crippled Tiger is still at least as strong as a >full strength Crafty (PII-300/PB off/small book against PIII-500). > >I find this interesting as some time ago Bob was laughing at me because I'm >still using a 386sx20 for some of my tests and algorithmic improvements. > >I would not be surprised if Chess Tiger 12.0 on PII-300 was able to stand Crafty >on a Quad-Xeon. After all that would only be a 4x speed advantage for Crafty. :) > You talk the talk, but can you walk the walk? I'll look forward to seeing tiger on ICC. > > > Christophe
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