Author: Robert Hyatt
Date: 08:11:32 02/09/00
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On February 09, 2000 at 10:57:04, James Robertson wrote: >On February 09, 2000 at 10:52:20, Andreas Stabel wrote: > >>I've made a program that takes a file with FEN positions and inverts the >>colours, castlings, en passant, side to move and so on to generate an >>equivalent position. The program is also able to exchange right and left >>sides of the board, but then castling info is lost. I is even possible to >>rotate the board 90 degrees, but only if there are no pawns ! >> >>The program is free for anybody, with source. Just e-mail me at anst@dolphin.no >> >>The interface is simple and the program may easily be compiled on any machine >>with a C compiler. If you want, you can get a Windows or SCO-Unix (Intel) >>executable. >> >>The program has the following interface: >>Usage: rfen <input file> [-<options>] >>Legal options are: >> c: Generate crafty setboard output >> e: Output warnings and info about errors in format >> f: Generate FEN output (Default) >> i: Invert board and black & white pieces >> m: Mirror right and left side (Castling is lost) >> r: Rotate board clockwise (Only if no pawns) >> s: Turn off strict checking of FEN >> v: Verbose >> >>To invert all FEN positions in a file type: >>rfen -ei file.fen > newfile.fen >> >>I hope somebody finds this useful >>Best regards >>Andreas Stabel > >This program sounds really great! > >James :) Crafty will do this with a little work. Enter a position. Type "savepos x1" then type 'flip' which inverts the board (black/white pieces move to the opposite side of the board and change colors.) Type savepos x2. Then type 'flop' which flops the board a-file to h-file leaving piece colors alone. etc. I use this to discover unexpected asymmetries in the eval, as a debugging tool.
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