Author: Marc Bourzutschky
Date: 17:03:20 04/01/04
Go up one level in this thread
On April 01, 2004 at 17:59:38, Eugene Nalimov wrote: >On April 01, 2004 at 15:16:34, Marc Bourzutschky wrote: > >>The Chessmaster format is indeed better > >What does it mean "better"? :-) > >It stores less information, thus compresses better. > No, it stores the same information, just in two different files. Those files together are still somewhat smaller than the Kadatch compressed ones... -Marc >Thanks, >Eugene > >>but no interface other than through >>Chessmaster is available. Besides, the Nalimov format has become a quasi >>industry standard. Since the contents of the two tablebases is the same, the >>main advantage of the Chessmaster is faster generation with less RAM, and >>somewhat smaller compressed file sizes. If there were a tool to translate >>Chessmaster format to Nalimov format we would already have all the 6-man >>tablebases by now. >> >>On April 01, 2004 at 14:18:16, Jason Kent wrote: >> >>>On April 01, 2004 at 14:07:22, Kurt Utzinger wrote: >>> >>>>On April 01, 2004 at 13:56:25, Jason Kent wrote: >>>> >>>>>I just read this in the FEG.txt that i got off the chessmaster website. >>>>> >>>>>XVI. WHY THE FEG FORMAT? ================================================ >>>>> >>>>>Perhaps, after reading all of this, you are wondering why Chessmaster >>>>>9000 does not use either of the more commonly used EGDB formats, namely >>>>>those created by Eugene Nalimov or Ken Thompson (both of which bear the >>>>>names of their creators). There are many reasons for this: >>>>> >>>>>1. FEG data is about 20% smaller. Additionally, half-sets can be used if >>>>> hard drive space is an issue, making a "full useable" file set that is >>>>> almost 1/3 the size of the complete Nalimov file set. >>>>>2. FEG generation is much faster and doesn't need a huge amount of free >>>>> RAM to create a set of files. >>>>>3. FEG can do any 6-man files on a 32-bit platform. >>>>>4. The Thompson format is not a complete set (especially pawns on both >>>>> sides are lacking). >>>>>5. The Thompson format stores DTC (Distance to Conversion) values, >>>>> meaning that it stores the number of moves to either mate OR to a >>>>> capture/promotion, and will play whichever move has the smallest >>>>> winning value. This can result in silly moves (a capture that leads to >>>>> a mate in eight moves instead of a non-capture that leads to mate in >>>>> three moves). >>>>>6. Since Chessmaster 9000 is a mass market product, the majority of its >>>>> users are not aware of these other formats and how to get them. Also >>>>> for the ease of development it is easier not to be dependent on >>>>> technical support for data that was created using tools that were not >>>>> developed by Ubi Soft. >>>> >>>> Hi Jason >>>> Maybe you have asked the wrong question: "Why does Chessmaster 9000 >>>> not support the egtb format that all other engines do?". >>>> Kurt >>> >>>The reason I ask is because the egtb format sounds like its a little better. I >>>kinda wish cm9k used nalimov so it would be more compatible.
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