Author: John Merlino
Date: 16:27:09 09/24/02
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On September 24, 2002 at 18:30:14, Robert Pawlak wrote: >Hi all, > >I know that CM uses it's own file format. But what I am wondering is which >format (Nalimov, Edwards) it is most similar to. For instance, does it use >distance to conversion, or distance to mate? Or both? > >Anyone know? > >Thanks >Bob It uses DTM. In one section of the documentation for FEG (the name of the generator), it says: --------------- Q: What EGDBs have actually been built? A: In the 1970's there was quite some reasearch on the topic. However, it became interesting after Ken Thompson dedicated a machine for several years to produce most of the interesting 5 piece EGDBs (DTC), and eventually made them available on CD for free. In the early 90's Stiller did some work on a massive parallel system on 6 pieces, but he couldn't save the data. In the meanwhile Edwards redid the 5 pieces for DTM but mainly for research, without compression. Nalimov redid them again, but used compression (better than Thompson's, but still larger because of DTM). Nalimov's have been widely used since 1999. This is all public knowledge. Not public were the Koning & Kuijf experments, done since 1995. These experiments were targeted at building EGDBs fast, and succeeded in being fast. Though the actual data is more or less the same as Nalimov's. --------------- So, I guess that the last sentence answers your question. I would suggest going to www.chessmaster.com and downloading FEG. Just click on the "Endgame Databases" link on the left side, in the "Downloads" section. The entire download is less than 100K, and it includes quite a bit of interesting documentation (so I'm told). jm
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