Author: Heinz van Kempen
Date: 11:03:03 09/28/05
Go up one level in this thread
On September 28, 2005 at 13:41:41, Uri Blass wrote: >On September 28, 2005 at 13:23:31, Heinz van Kempen wrote: > >>On September 28, 2005 at 13:15:37, Günther Simon wrote: >> >>>On September 28, 2005 at 09:30:36, Heinz van Kempen wrote: >>> >>>><<And where exactly are the games WITH comments in that page? >>>>I mean there are 3 thousant links there, so i'm confused.....:-) >>>> >>>>Does the: |||CEGT 40/40 (2Ghz) all games so far (> 12 Mb)||| include the >>>>depth,search...,etc......... or is in another file?>> >>>> >>>> >>>>Hi George, >>>> >>>>the games with Fritz 9 are with comments, second file from above. >>>> >>>>The 12 Mb file contains all +37000 CEGT 40/40 games up to now and is unstripped >>>>from comments. Otherwise the file would be 100 Mb. >>>> >>>>http://www.husvankempen.de/nunn/downloads.htm >>>> >>>... >>> >>>Hi Heinz, >>> >>>Is it possible that a lot of 'commented' games _don't_ include >>>the depth? >>> >>>Best regards, >>>Guenther >> >>Hi Guenther, >> >>as already posted that 12 Mb file with more than 37000 games does not include >>comments. Guess how big such a file would be with comments. > >Let see one comment >[%eval 7,16] [%emt 0:01:15] > >it can be compressed to 7,16,75 >depth is usually 10-17 and I guess that it can be compressed to average of >something near 3 bits. > >evaluation probably can be compressed to something near 8 bits as average(there >are big numbers but they are minority) and time can be compressed to 7 bits. > >total number of bits is near 18 bits per comment. > >I claim that >24 bits that are 3 bytes are needed for both comment and move. > >explanation: >If we talk about a single move then it can be compressed to 6 bits because we >need only move generator that generate the moves in specific order and usually >there are less than 64 moves so it is 6 bits per ply(if the number of moves is >not more than 32 then it is even only 5 bits. > >37000 games probably include something near 4,000,000 plies > >4,000,000 plies*3 byte=something near 12 Mbytes. > >My conclusion is that 12 Mbytes are enough to compress all the games with >comments and 3 mbytes are enough to compress all the games without comments. > >If you need more than it then the compression tools that you use are not good >enough(for example they probably do not translate moves in the pgn to numbers). > >Uri Hi Uri, Winzip is not good in compressing CB and Arena pgn files including comments. WinRAR is only a bit better here. An alternative would be .cbv files with a high compression rate, but not all people use the ChessBase 8 or 9. Best Regards Heinz
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