Corner (fence)

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A corner, also called an apex, is an obstacle seen on the cross-country phase of eventing.

It is similar to a "fan" jump seen in show jumping. As the name suggests, the fence makes a "V" shape, that can have an angle up to 90 degrees [1]. Due to their relative difficulty, the corner is not seen at the lowest levels.

The corner is meant to be jumped on a line perpendicular to an imaginary bisecting line of the angle, and as close to the narrow apex as possible while still far enough in on the jump that the horse knows he is supposed to go over it. If the rider aims too far toward the wider section of the obstacle, it may be too wide for the horse to clear it. This usually results in a stop or run out, although some of the braver horses are quite happy to "bank" the fence (touching down on it before quickly jumping off). This is not desirable, as the horse is more likely to slip, catch a leg, or fall. If the rider aims too far toward the apex, it is very easy for the horse to run right past, especially if is unsure as to whether he is to jump the obstacle.

The corner is a precision fence, requiring accurate riding and good training, with the horse straight and between the rider's aids. Due to the build of the fence, an uncommitted horse and rider pair may have a run-out at this type of obstacle. It is best that the rider use their aids to "block" the horse from running out to the side, with a strong contact to prevent the shoulders from popping, and a supporting leg.