Hi, I have to convert PGN files using algebraic notation and I'm doing ok so far.
I have one major stumbling block and I was wondering if anyone has done something similar. Algebraic notation is a short form of chess move that only contains an optional piece identifier, followed by destination square followed by optional markers: e5 => pawn moves to e5 Bf3 => Bishop moves to f3 Nh2+ => Knight moves to h2 (and check) Parsing these is ok, but my task is to generate output containing both start and end positions for a move. My research seems to indicate that this isn't easy without maintaining the current state of the board and applying each move as I parse it to update the board and therefore be able to determine where the move came from. Another option is to maintain an index of piece-destination (possible_start_position_1, possible_start_position_2...) - and then for each piece lookup where it could possibly have come from - I'm not sure this helps though :) What was a simple text transformation problem has become a game engine! I'd be interested to hear any thoughts from people who have attempted PGN parsing in antlr Thanks, Kev List: http://www.antlr.org/mailman/listinfo/antlr-interest Unsubscribe: http://www.antlr.org/mailman/options/antlr-interest/your-email-address -- You received this message because you are subscribed to the Google Groups "il-antlr-interest" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/il-antlr-interest?hl=en.
