Article View: sci.logic
Article #396Re: "Solvability" in Chess
From: Gary L Snethen
Date: Mon, 28 Sep 1992 05:49
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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Newsgroups: sci.logic,sci.math,rec.games.chess Path: arc1-ca.pugleaf.net!sparky!uunet!usc!sdd.hp.com!ux1.cso.uiuc.edu!news.iastate.edu!pv34ad.vincent.iastate.edu!xeno From: xeno@iastate.edu (Gary L Snethen) Subject: Re: "Solvability" in Chess Message-ID: <xeno.717659399@pv34ad.vincent.iastate.edu> Sender: news@news.iastate.edu (USENET News System) Organization: Iowa State University, Ames IA 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 Lines: 33