Abstract: An apparatus for determining the identity and position of game pieces disposed at any desired location within various fields of a playing area, such as a chessboard. The fields are subdivided into at least two subfields and an electrical signal is applied to one of the subfields. The signal is conducted to a second subfield by means of identification devices disposed at the underside of the game pieces where the signal is detected by a scanning device and evaluated in an evaluation device. The evaluation device stores signals associated with the individual game pieces as a function of the identification devices so that a signal comparison determines the identity, as well as the position, of each respective game pieces disposed in the playing area.

Abstract: A magnetically adjustable relay which may have an internally positioned sealed contact system is disclosed wherein the switching element of the contact system is elongated and has one end affixed to an elongated ferromagnetic adjusting plate. The adjusting plate is attached to the coil body by means of torsional cross pieces or bars. The position of the adjusting plate within the coil body can be adjusted by means of an exteriorly applied magnetic field which deforms the cross bars.