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Article #396

Re: "Solvability" in Chess

#396
From: Gary L Snethen
Date: Mon, 28 Sep 1992 05:49
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In <1992Sep28.030130.18379@afit.af.mil> wbralick@afit.af.mil (Will Bralick) writes:

>In article <xeno.717639078@pv34ad.vincent.iastate.edu> xeno@iastate.edu (Gary L Snethen) writes:
>>
>>If all moves lead to a forced loss, claim a draw.
>>   reasoning:  We cannot assume our opponent will make a mistake.  Our best
>>               option is therefore to claim a draw.

>Huh?  If _all_ moves lead to a forced loss then our opponent cannot
>possibly make a mistake.  Resign.

Very sorry for the confusion...  Let me restate it more clearly.

If currently both players are in a loop, and the third repetition has
occured, then:

If all (alternative) moves lead to a forced loss, claim a draw.
   reasoning:  We cannot assume our opponent will make a mistake.  Our best
               option is therefore to claim a draw.

A similar situation happens all the time in 'go' in local positions...
Ever hear of a 'seki'?  Whoever attacks, loses.  This can happen in chess
too...  Whoever exits the loop first, can be forced to lose.  Thus, in this
situation, the game is a draw (the loop will never be exited).

>Regards,

>-- 

>Will Bralick					wbralick@afit.af.mil

---Xeno
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From: xeno@iastate.edu (Gary L Snethen)
Subject: Re: "Solvability" in Chess
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References: <xeno.717575523@pv34ad.vincent.iastate.edu> <1992Sep27.161451.20136@cbnewsl.cb.att.com> <xeno.717639078@pv34ad.vincent.iastate.edu> <1992Sep28.030130.18379@afit.af.mil>
Date: Mon, 28 Sep 1992 05:49:59 GMT
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