Game for teaching principles of tennis - uses dice and scale to determine distance and direction of ball on model court with intersecting lines

摘要

The game is used to teach the principles of tennis and is played on a board (1) representing a model court (2). Longitudinal parallel lines (4) are marked, together with transversal curved lines (5), their intersections being provided with holes for figurines (8). Singles or doubles are possible, each player taking turns to choose his shot from the position occupied by his figurine. A protractor instrument (6) and a graduated tape delineate this and dice (7) are thrown to correct for distance played and ball direction.