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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: <1992Dec24.153554.629@uoft02.utoledo.edu>
- Date: 24 Dec 92 15:35:53 EST
- References: <1992Dec22.181439.15595@midway.uchicago.edu> <1992Dec23.120510.617@uoft02.utoledo.edu> <PHR.92Dec23124354@napa.telebit.com> <1992Dec24.001423.23983@pony.Ingres.COM>
- Organization: University of Toledo, Computer Services
- Lines: 48
-
- In article <1992Dec24.001423.23983@pony.Ingres.COM>, jrb@Ingres.COM (John Black) writes:
- > 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).
- >>
- > Correct. For example, in the following position Black has enough material
- > to mate White, but Black cannot mate White even with White's cooperation:
- >
- > - - - - k - - -
- > - - - - - - - - Using the "Winslow" notation for Pawns: o is BP, O is WP
- > - o - o - o - o
- > o O o O o O o O
- > O - O - O - O -
- > - - - - - - - -
- > - - - - K - - -
- > - - - - - - - -
- >
- > I am, of course, assuming that Black did not just play a7-a5, c7-c5, e7-e5 or
- > g7-g5 allowing an en passant capture.
- >
- > Now to find a position where White has a forced win... that's another story.
- > Ugh!
-
- Hmmm... I think I see what you meant here. Yes, I apologize we were arguing
- semantics, as this does fit the letter of the request.
-
- However, it depends on "has enough pieces". Obviously, neither side has enough
- pieces to mate the other, and yet is they were in a different position, they
- could mate. (So to speak.) Interesting problem. Any other solutions?
-
-
-
- >
- > john//
- > jrb@ingres.com
-