@Daniel Zacharias: some suggestions for your preset of Grant Acedrex:
it seems that the initial double step of the Pawn is not implemented. It should be corrected. Note that the en-passant rule was not existing for this game.
I would replace the Bishop by a Crocodile and the Unicorn by a Rhinoceros in order to cope with the original codex illustration. However, using your icons with Bishop and Unicorn is not wrong either.
I have made a page called Grant Acedrex presenting the rules that your preset is playing. You could correct the link. Also, maybe, you could change the title of the present page for Grant instead of Grande, in order to be consistent (and accurate).
@Daniel Zacharias: some suggestions for your preset of Grant Acedrex:
it seems that the initial double step of the Pawn is not implemented. It should be corrected. Note that the en-passant rule was not existing for this game.
I would replace the Bishop by a Crocodile and the Unicorn by a Rhinoceros in order to cope with the original codex illustration. However, using your icons with Bishop and Unicorn is not wrong either.
I have made a page called Grant Acedrex presenting the rules that your preset is playing. You could correct the link. Also, maybe, you could change the title of the present page for Grant instead of Grande, in order to be consistent (and accurate).