Stone rings, tenoned into the wall at mid-court, appeared in the Terminal Classic era. Actually sending a ball through the ring must have been a rare occurrence. The players could not use their hands or even feet to guide the ball. Moreover, the rings were only slightly larger than the ball itself and were located at no small distance from the playing alley. At Chichen Itza, for example, they were set 6 meters above the alley, while at Xochicalco they set at the top of an 11-meter-wide apron, 3 meters above the playing alley (see lead photo).