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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...