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Game Courier Developer's Guide. Learn how to design and program Chess variants for Game Courier.[All Comments] [Add Comment or Rating]
🕸📝Fergus Duniho wrote on Tue, Mar 10, 2020 08:35 PM UTC:

I don't yet have a clear idea of what you mean by fast castling. Are the King and Rook just swapping places? If that's what's going on, Game Courier has a swap command that should prove useful.