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H. G. Muller wrote on Thu, Sep 24, 2009 01:22 PM UTC:

OK, I finished the conversion of ChessV. The same URL now contains the
finished version. This is a 'Release' compile, i.e. there is no debug code
in there that slows it down anymore, and it reaches reasonable depth
(similr to Fairy-Max).

It should handle promotions automatically. (In so far the promotion piece
is indicated in the input move by the first letter of the name under which
ChessV knows it, except for Knight, which must be indicated by 'n'.) This
WinBoard version of ChessV supports both conventional and incremental time
control.

Unfortunately it still has the same bug as the normal ChessV: in complex
positions it sometimes switches to playing the other side...

Sam Trenholme wrote on Thu, Sep 24, 2009 03:28 PM UTC:

Muller: Using the ChessV 0.9.0 instead of the ChessV 0.9.2 codebase might fix the bug with it changing sides in some positions, usually lost (well, in ChessV's GUI it just moves some pieces around).

ChessV 0.9.0, IMHO, was more bug-free than ChessV 0.9.2, and I feel it was Strong's best release of ChessV.

H. G. Muller wrote on Thu, Sep 24, 2009 10:15 PM UTC:

OK, thanks for this info. But where can this 0.9.0 version be obtained?

In the version I have posted now I was able to work around the
color-switch problem: this seems to occur when there is  fail-high in the
root. The research then seems to be done with a messed-up move list. By
doing the initial search with a fully open window in every iteration, there
can never be a fail high, and the problem does no longer occur. In fact it
seems ChessV plays a lot stronger by this! I guess that even in the cases
where there was no color switch, a re-search would make it do a random
move.

Major remaining problem is that ChessV seems to be blind for promotions in
its search. It takes no measures to stop an enemy promotion, and its score
stays positive up to the very moment that the opponent promotes. After that
it is of course at -9000...

Sam Trenholme wrote on Thu, Sep 24, 2009 11:55 PM UTC:

ChessV 0.9.0 is available here:

http://samiam.org/chessv/

The source for 0.9.0 is the 'ChessV_Source_0_9.zip' file

Maybe ChessV 0.9.2 will play better than 0.9.0 with your fixes, though. Let me know when a download is available.

H. G. Muller wrote on Fri, Sep 25, 2009 08:57 AM UTC:

The download of the 0.9.2WB is already available at the link I gave below.
Gregory Strong is going to look at the remaining issues himsef, though, so
perhaps we should wait for that. (
http://www.talkchess.com/forum/viewtopic.php?t=29828&start=25 )

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