void removeFriendsAndBorders(Piece piece, ArrayList<Point> points) {
boolean up = piece.isUp();
for (Iterator<Point> it = points.iterator(); it.hasNext(); ) {
Point point = it.next();
if (point != Poussin.PROMOTING
&& (point.x < 0 || point.y < 0 || point.x >= GRID_WIDTH || point.y >= GRID_HEIGHT)) {
it.remove();
continue;
}
Piece pieceOnSquare = getPosition().getPiece(point.x, point.y);
if (pieceOnSquare != null && pieceOnSquare.isUp() == up) it.remove();
}
}
