Why a conker can break into sharp pieces
In conkers, players swing a horse-chestnut seed on a string to strike an opponent’s seed. The hit lands in a small area, so the force is concentrated rather than spread across the conker. If the seed has dried and become brittle, a crack can race outward from the impact point and split it apart.
A conker is not wood: it is a seed. But when it fractures, its hard pieces can still have pointed edges. Because the game takes place at close range, those pieces may travel toward a player’s face—especially the eyes.
The risk follows the swing
The string lets a player build up speed before impact, and the opponent is usually watching the incoming conker. That makes a flying fragment difficult to anticipate or dodge. The same direct hit that decides the game can therefore turn a small crack into a sudden eye hazard.
