Author: Brian Katz
Date: 11:26:24 01/24/03
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On January 24, 2003 at 08:59:28, James T. Walker wrote: >On January 24, 2003 at 01:04:17, Brian Katz wrote: > >>In the following famous position, which I am sure many of you are familiar with, >>Botvinnik - Capablanca, AVRO Holland 1938 1-0...White (Botvinnik) played the >>extraordinary 30.Ba3!! and went onto win Brilliantly. >>The remaining moves were:30...Qxa3 31.Nh5+! gxh5 32.Qg5+ Kf8 33.Qxf6+ Kg8 34.e7 >>Qc1+ 35.Kf2 Qc2+ 36.Kg3 Qd3+ 37.Kh4 Qe4+ 38.Kxh5 Qe2+ 39.Kh4 Qe4+ 40.g4 Qe1+ >>41.Kh5 Black Resigns 1-0 >> >>[D]8/p3q1kp/1p2Pnp1/3pQ3/2pP4/1nP3N1/1B4PP/6K1 w >> >>My question is will running full games with Fritz 7......................... >>Hash Tables set at 818 MB cause heat problems for an AMD Athlon 2600+ 1 gig of >>DDR SDRAM. >> >>I have beeb experimenting with Fritz 7 Hash Table settings in the infinite >>analysis mode. >>Here are some results based on various Hash Table settings. Time to find 30.Ba3 >>as a winning move not just to see it in the list of alternatives. Also nodes per >>second. >>At 818 MB Hash, I hear no extra work on the harddrive, only when first setting >>the Hash at 818 for a few seconds then no more. >> >> >>The results from 16,32,64,128,256,and 512 MB Hash Tables respectively were all >>basically the same. >> >>At 16MB it took 3 seconds to notice that 30.Ba3...=(-0.16) and Black is better >>and then it drops to 0.00...Then at 1:33 it jumps to + 0.34 in favor of White. >>Then at 3 min 15 secs.it jumps to +-(3.97) kN/s at 1116. >> >>At 256 MB it took 3 seconds to notice that 30.Ba3...=(-0.16) and Black is better >>and again drops to =(0.00)...Then at 1:05 it jumps to + 0.34 in favor of White. >>Then at 2:00 it jumps to +-(3.31) at 1064 kn/s >> >>Now at 512 MB everything is basically the same except the value at 1:02 is at >>+0.50 rather than the + 0.34 as above. Then at 1:57 it goes to +- 3.88 >> >>At 768 the only real difference is that the value at the 1:00 minute mark is >>down at + 0.34 >> >>At 818 I get similar results early on then at 1:03 + 0.50 which is higher than >>the reading at 768 MB setting, and 2:08 the Highest value at this early stage +- >>(3.97) kN's flucuate in the low 1000's in all of the settings listed except when >>set at the 16 MB Hash which was in the 1100's. >> >>So basically, will the higher value in the same time period such as the + 0.50 >>as opposed to the + 0.34 make a difference in a game. Will the higher Hash Table >>818 MB settin, yielding an evaluation + 3.99 at 2:10 be better than the + 3.88 >>at 1:58 with the lower Hash Table setting? >> >>My main concern is that I do not want to over tax my processor. >> >>If anyone has some insight on this It would be greatly appreciated. >> >> >>Thanks >>Brian Katz > >Hello Brian, >How do you get Fritz 7 to accept 818M hash setting. Anything I set over 288M >seems to default to 287 as noted in the "Notation" window where the moves are >displayed. >Jim Hello Jim, I have 1 gig (1024 MB) of DDR SDRAM. The more RAM you have the higher Hash Table setting Fritz will allow you to use. Of course the faster processor is better in utilizing the higher hash tables. You did not mention how much RAM you have on your PC. In your engine window it will show what your max. limit should be. In mine it shows 819 MB But I set it at 818 since I heard it was better to use powers of 2. Even NUMBERS. Some believe it should be 8,16,32,64,128,256,512 and so on. I have read it both ways on this site. Also, when you go into MENU>GAMES on your tool bar, you should see a maximize button. That will set your Hash Tables to it's highest setting. However, this setting will be much too high for fast time controls, especially with a slow processor. I had a 350 MHz Pent II. Maximizing was much to high for me to get good results. Brian
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