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- Xref: sparky rec.games.chess:11828 rec.puzzles:8079
- Path: sparky!uunet!mcsun!sun4nl!tuegate.tue.nl!blade.stack.urc.tue.nl!marcelk
- From: marcelk@blade.stack.urc.tue.nl (Marcel van Kervinck)
- Newsgroups: rec.games.chess,rec.puzzles
- Subject: Re: Chess Puzzle
- Message-ID: <6743@tuegate.tue.nl>
- Date: 21 Dec 92 15:44:10 GMT
- References: <1992Dec17.180444.12875@dartvax.dartmouth.edu>
- Sender: root@tuegate.tue.nl
- Followup-To: rec.games.chess
- Organization: MCGV Stack, Eindhoven University of Technology, the Netherlands.
- Lines: 47
- X-Newsreader: TIN [version 1.1 PL6]
-
- J. Theodore Schuerzinger (J.Theodore.Schuerzinger@dartmouth.edu) wrote:
- :
- : White Black
- : ??? Bc8-b7+
- : e2-e4 f4xe3+ (en passant)
- :
- : Reaching the diagrammed position.
- :
- : NOW I'm at a loss.
-
- So am I, I just found major errors in the problem. :-(
- First let me explain the intended solution. The last moves
- are intended as you found them. I planned Kf2-f3 as the move
- preceeding these. So the position 'reached' is:
-
- - - B - - - - -
- o - - - - - - -
- * - - - - - - -
- - - - - - Q - -
- - - - - - * - -
- - - - - - - - -
- - - - - o k - -
- - - - - - - - K
- position before 1. Kf2-f3 Bc8-b7+ 2. e2-e4 f4xe3++ e.p.
-
- White's Kf2-f3 is bad, since a7-a8=Q+ draws the game.
-
- Now, where did _I_ go wrong?
- Unfortunately I completely ignored the possibilty of captures in the last
- two reconstructed plies. Bc8-b7+ isn't the only unmove before e2-e4,
- other possibilities are Bc8xXb7+, where X is P,N,B,R or Q.
- Needless to say that these options make the problem worthless.
- Also, considering Bc8-b7+ as the move before e2-e4, white could have
- played Kf2xXf3 to reach the position, or even b6xXa7 !! (with
- X any piece except K) I simply didn't think of all these possibilities
- when I made up the problem.
-
- Reformulating the problem by prohibiting captures in unmoves is
- impossible since it also eliminates the en-passant capture. I'll try
- to rescue the problem and post it to rec.games.chess whenever I think
- I eliminated these errors.
-
- Marcel
-
- --
- Marcel van Kervinck
- marcelk@stack.urc.tue.nl
-