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Subject: Re: CCT7: Crafty vs. Fafis

Author: Robert Hyatt

Date: 20:30:51 02/12/05

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On February 12, 2005 at 19:16:59, Christian Koch wrote:

>Would be good if the TD could show us the logfile from the server to explain
>what was really going on....


I wasn't there at the time, so I wasn't involved.  But apparently crafty offered
a draw in a position that was heading into an EGTB draw.  The opponent wanted to
accept, but didn't tell the chess server, rather he told channel 64 that the
game was drawn.  The TD responded that the game is still going on, and your
clock is running.  It was a mess.

First thing is that you can't assume the game ends on a draw offer every time,
because the GUI can make mistakes, or there are race conditions such as you
offer a draw, get no response, and so you make a move which could be taken to
retract the offer.

I would not have cared whether the TD called the game a draw or time loss, this
isn't that big a deal.  It does speak volumes for having a debugged and
thoroughly tested system, so that this simply can't happen.  I had my fair share
of such bugs early in the development of Crafty, but by playing enough games on
ICC, these bugs are eliminated before a tournament comes along.



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