Why does this curling game not follow the current rules of curling ? If any of the first 4 stones are over the hog line and rest on the centerline , they cannot be knocked off the centerline for the first 4 stones. If they are knocked off the centerline it is a foul shot. The offending stone is removed and the stone which has been knocked off is replaced in its original position. Too many players in the game would fail,if this rule were respected