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- Path: sparky!uunet!caen!malgudi.oar.net!uoft02.utoledo.edu!dcrosgr
- From: dcrosgr@uoft02.utoledo.edu
- Newsgroups: rec.games.chess
- Subject: Re: It is legal to play chess in Yugoslavia
- Message-ID: <1992Dec24.151612.626@uoft02.utoledo.edu>
- Date: 24 Dec 92 15:16:12 EST
- References: <1992Dec22.181439.15595@midway.uchicago.edu><1992Dec23.120510.617@uoft02.utoledo.edu> <PHR.92Dec23124354@napa.telebit.com>
- Organization: University of Toledo, Computer Services
- Lines: 30
-
- In article <PHR.92Dec23124354@napa.telebit.com>, phr@telebit.com (Paul Rubin) writes:
- > > Obligatory chess question: Does there exist a chess position in
- > > which Black has enough material to mate White in theory, but Black
- > > cannot mate White even with White's cooperation, while on the other
- > > hand White can mate Black without Black's cooperation?
- >
- > No. If it can be proven that black cannot mate white even with white's
- > cooperation, then it is impossible in theory for black to mate white.
- >
- > The two situations can not co-exists in our universe using our logic.
- >
- > This is an issue of semantics. The question asked about when
- > black has *enough material* to mate White, meaning there are
- > positions where Black could mate White with that material; however,
- > this does not have to be one of those positions (and Black can't
- > be able to reach such a position even with White's cooperation).
- >
- > For example, I think it is normally possible to mate with KBB vs. K.
- > But if both Bishops are on the same color squares (through
- > pawn promotion), mating might not be possible--I haven't thought
- > about it enough to be sure.
-
- Hardly semantics. Either it is possible for black to mate white, or it is
- impossible for black to mate white.
-
- Enough material implies it CAN be done. However, if it can not be done, then
- obviously black needs (at least) one other piece to force a mate.
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