Author: Andrew R. Case
Date: 07:09:31 01/24/03
Go up one level in this thread
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
The reason you can't get hash tables larger than 287mb is your
operating system. Only windows nt, 2000, or xp can make use of larger hash
tables.
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