Author: Dave Gomboc
Date: 10:54:53 06/05/99
Go up one level in this thread
On June 05, 1999 at 13:22:31, José de Jesús García Ruvalcaba wrote: >On June 04, 1999 at 20:20:38, Dave Gomboc wrote: > >>On June 04, 1999 at 19:39:36, Mike Leahy wrote: >> >>>On May 27, 1999 at 20:48:55, Dann Corbit wrote: >>> >>>>From the PGN Standard >>> >>> >>>>16.1.4: Examples >>>> >>>>Here's the FEN for the starting position: >>>> >>>>rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1 >>>> >>>>And after the move 1. e4: >>>> >>>>rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq e3 0 1 >>> >>>This is problematic. The position is identical to... >>> >>> rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq - 0 1 >> >>The position you describe with the string not containing "e3" is not technically >>reachable (even ignoring the ply count for now) because Black can't lose a move >>while White slides a pawn first to e3, then to e4. >> > > If we ignore the ply counts, then the position is reachable: 1. e3 Nc6 2. Bd3 >Nb8 3. Be2 Nc6 4. Bf1 Nb8 5. e4 > Of course, the last digit for the fen string would now be 5 instead of 1, since >it follows black's fifth move. Good point. I forgot that the bishop was free to slide after e3. Dave
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