-(defun name-of (piece) (char ".@O?" piece))
-(defun title-of (piece) (nth (1- piece) '("Black" "White")) )
+(defun name-of (piece) (schar ".@O?" piece))
+(defun title-of (piece)
+ (declare (fixnum piece))
+ (nth (the fixnum (1- piece)) '("Black" "White")) )