Zitat von
Mychess
I'll come back when I have a solution, but it will be probably not a simple patch.
Well, I think you shouldn't waste your time with this patch (which is almost impossible in assembly language).
If these ssystem3/4 programs don't accept castlings after a position setup, then we should just accept it - take it as a 'feature'.
And in MessChess it's already working with the new plugin, so it's not really a problem.