Chess960 FEN support

[neilgd]

Any chance of supporting Chess960 FENs, eg rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1?

Note the extra section to denote castling rights.

Thanks!

[Geras1mleo]

Hi @neilgd !

I've just tested this FEN out and it works just fine, could you provide a string for which it does not work for you?

using Chess;

var board = ChessBoard.LoadFromFen("rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1");

Console.WriteLine(board.ToFen());

Thanks!

[neilgd]

My bad! It was loading a PGN with FEN header set that didn’t work, but I can double check later.

…

On Fri, 14 Nov 2025 at 20:36, Sviatoslav Harasymchuk < ***@***.***> wrote: *Geras1mleo* left a comment (Geras1mleo/Chess#30) <#30 (comment)> Hi @neilgd <https://github.com/neilgd> ! I've just tested this FEN out and it works just fine, could you provide a string for which it does not work for you? using Chess; var board = ChessBoard.LoadFromFen("rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"); Console.WriteLine(board.ToFen()); Thanks! — Reply to this email directly, view it on GitHub <#30 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AANNPRPKMWUZTDRQTYG2GE334Y4NNAVCNFSM6AAAAACMC2JJT6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTKMZUGQ3TQMBSGM> . You are receiving this because you were mentioned.Message ID: ***@***.***>