question: public static final String squareToString ( int square ) { StringBuilder ret = new StringBuilder ( ) ; int x = Position . getX ( square ) ; int y = Position . getY ( square ) ; ret . append ( ( char ) ( x + 'a' ) ) ; ret . append ( ( char ) ( y + '1' ) ) ; return ret . toString ( ) ; }
target:  Convert a square number to a string, such as "e4".