Author: Eduardo Suastegui
Date: 10:05:21 03/13/98
The latest version of the software is now available from http://home.earthlink.net/~esuastegui/eschess, under the PGN Manager section. Version 1.2 now contains the following enhancements: 1) Filter by position: A new filter option, 'position=pgn_file', has been added to the -f FILTER command. The software will attempt to locate games in a PGN database which contain the same position as the end position in the pgn_file game. 2) Set ECO classification enhancement: Previous versions of the software attempted to match by locating entries in the specified ECO database which contained the same moves as the first N moves in a given game. This approach was somewhat deficient in that it did not account for transpositions, i.e., 1.d4 d5 2.c4 Nf6 is the same as 1.d4 Nf6 2.c4 d5, but the software will only find a match before if the exact move sequence was located. The new version searches by position, and seems to more accurately locate ECO codes. In addition, this process ismuch faster now, since a look-up table is used for fast searches. However, as before, the quality of the ECO database used is important. The ECODB.PGN database used during testing seems to ommit some important lines, so that classification of certain games is still incorrect, although more reasonable classifications are made now. If some one could provide me with a more complete ECO PGN database, I am sure I could make this work with a great degree of accuracy. -- Ed Suastegui http://home.earthlink.net/~esuastegui/eschess "Once upon a time, chess players would gather at coffee houses. Now, they ponder chess over a cup of Java."
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