Abstract: A board game involving the establishment of spatial relationships and measurement thereof to determine the correctness of the estimation. The establishment of a spatial relationship is accomplished by moving a marker along a rectilinear element and/or moving a marker about the center of a circular element to establish, respectively, or alternatively, a spatial relationship between an end of the rectilinear element and the first-mentioned marker and/or the angle made by the marker about the axis of the circular element with reference to, for instance, a radial line extending from the center of the circular element. Alternative ways of playing the game are disclosed. A board having the rectilinear and circular elements may provide marked areas around the periphery thereof which are imprinted with indicia directing the players to estimate a length or an angle preset on the elements with the markers and of which there may be a plurality.