Author: Günther Simon
Date: 11:30:31 09/28/05
Go up one level in this thread
On September 28, 2005 at 14:03:03, Heinz van Kempen wrote: >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 There is a much better one especially for PGNs, so if you have lots of big PGN files for CEGT now, you could try the free compressor by George Lyapko. (3 times better compression than e.g. WinRar for PGN) http://www.geocities.com/lyapko/winboard.htm Guenther
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