Author: Robert Hyatt
Date: 10:54:07 10/31/99
Go up one level in this thread
On October 31, 1999 at 10:12:06, Amir Ban wrote: >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. >>> >>>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. :) >> >> >> >> Christophe > > >That's approximately the speed advantage in crafty vs. ban on ICC (that is, >pre-noplaying and censoring): > >4 x 450 MHz at 5 + 3 inc vs. 2 x 350 MHz at 5 + (-1) (that's my setting because >I'm manual). If the game lasts 60 moves that translates to: > > > (1800 MHz * 8 min) / (700 MHz * 4 min) > 5 > >Good luck, >Amir make that 1600mhz. Crafty is, and has been, 4 x 400. Bruce has the 450's.
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