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Old January 21st 04, 06:50 PM
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Default ChessVU

ChessVU V3.0 is available at:

PGN viewer functions are now FREEWARE

Francesco Barcio

Example of new features: Processing TWIC files

TWIC files are downloadable as files (CBF/CBI zipped format)
from http://...

Using ChessVU you can access those files without unzipping them. You can
store them in a directory (e.g. \2003 for all 2003 files) and keep them like
they are. ChessVU unzips and opens the selected CBF/CBI files, whenever
needed. This new feature saves disk space and makes the TWIC archive on your
PC much cleaner.

Even though you can search the files in their original format, and produce
all the export files you need, you may want to prepare some intermediate
summary file. There are several reasons to do this:
- ChessVU offers a nice List Window, with column sorting capability; with a
single file you can have all the games easily sorted by player, ELO,
opening, source etc.
- doubles: the same game may appear in different files, because
of progressive editions, or other needs; with a single file you can easily
detect and filter out doubles
- tournaments: they are often split in 2 files. ChessVU offers a nice
function to show the Tournament Cross Table, that requires the games to be
in the same file, sorted by source.
- statistics

ChessVU allows fast merging of files into a single file (e.g.
twic2003.cbf), by a new function (Merge databases), and then marking for
deletion all the doubles. If you try these functions with 2003 TWIC files,
you get a single file of 78000 games, that reduces to around 75000 after
doubles deletion.

Mark doubles function has been improved to take into account two typical
situations often appearing in TWIC files:
- 2 games differ only for 1 or 2 half-moves (this often happens in the last
moves of the game, where a second game edition shows e.g. that was the
Bishop rather than the King to take a pawn); in this case the only
reasonable criterium is to keep the second edition (to allow for this, the
games must be in the original sequence)
- 2 games differ because a second edition reports more moves, that is one
game is a subset of the other; in this case, of course, the longer game is

From your stored intermediate file (e.g. twic2003.cbf) you can now condense
any kind of game subsets, perhaps filtering out zero length games (archived
only for tournament tables completeness), blitz, simul, random etc., and/or
searching specific game profiles with the Search Header function. You can do
this by marking games (Mark blitz, rapid, blindfold etc.) and/or by Search
Header function (that now also allows to consider marked/unmarked games).
Search Header function also works on the original zipped files set (by input
of "$.zip" string).

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