void SetBlackToPlayEvent P((void));
void InitBackEnd1 P((void));
void InitBackEnd2 P((void));
-int IsPromotion P((int fromX, int fromY, int toX, int toY));
+int HasPromotionChoice P((int fromX, int fromY, int toX, int toY, char *choice));
int InPalace P((int row, int column));
int PieceForSquare P((int x, int y));
int OKToStartUserMove P((int x, int y));