English billiards running break. If a foul occurs, two points are awarded to the opposing player who has the choice of playing from where the balls lie or they can be respotted. There are a few different ways a foul can occur by: English billiards English billiards, called simply billiards in the United Kingdom, where it originated, and in many former British colonies such as Australia, is a cue sport that combines the aspects of carom billiards and pocket billiards. Two (originally both white, with one marked e.g. with a black dot, but more recently one white, one yellow) and a red
Dynamical billiards Dynamical billiards A billiard is a dynamical system in which a particle alternates between motion in a straight line and specular reflections from a boundary. When the particle hits the boundary it reflects from it without loss of speed. Billiard dynamical systems are Hamiltonian idealizations of the game of billiards, but where the region contained by the boundary can have shapes other than rectangular and even be multidimensional. Dynamical billiards may also be studied on non-Euclidean geometries; indeed, the very first studies of billiards established their ergodic motion on surfaces of constant negative curvature. The study of billiards which are