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Subject: Re: Is Sapphire 2 playing low Master Strength at 40/2hrs?

Author: Ian Osgood

Date: 20:40:04 08/13/99

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On August 13, 1999 at 22:40:18, Dann Corbit wrote:

>On August 13, 1999 at 22:21:38, James T. Walker wrote:
>[snip]
>>Of course most of the Cheating is random or they would be caught easily.  Don't
>>look for reasons behind the cheating.  There are none that make any sense.
>If the cheating is random, either:
>0.  It will be rare enough to not affect their ELO much, in which case the
>probablility of you facing such a cheater will not affect your ELO much.
>1.  It will be often enough to raise their ELO in a factor equivalent to the
>probability of their cheating against you.
>
>The ELO system is self-healing, even against cheaters.

I am IanO, maintainer of SapphireII.

I haven't seen many likely instances of computer cheating against SapphireII.
What I *do* see are people who find a loophole in Sapphire's opening book, and
then repeat games against it using that same opening.  People also have matched
SapphireII with a zero inc time control, then played a stonewall-type opening,
locking up the position and repeating moves behind their wall until SapphireII
runs out of time (it takes a minimum of one second to respond).  SapphireII has
ditched a hundred points at a time through such tactics (until I get the abuser
on my noplay list).  I fight back with restrictive formulas.

Ian



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