Patent ID: 6168158
Filing Date: 2001-01-02
Classification: A63F

Abstract:
A game device, comprising: a game board divided into discrete squares and pieces of differing type for placing on these squares, wherein the squares are ordered in a rectangular array including rows and columns of squares, which game device includes detection means for detecting the possible presence and the type of a piece on each square, in addition to means for generating appropriate detection signals; resonance coils arranged in the playing pieces, wherein each resonance coil has electrical and magnetic properties related unambiguously to the type of playing piece; a plurality of elongate transmit coils and receive coils arranged in the board and each extending below a row or column of squares such that a part of both a transmit coil and a receive coil is situated under each square; means for successively selecting a transmit coil and a receive coil in a scanning manner; an amplifier which in the scanning manner is connected with its output to a selected transmit coil and connected with its input to a selected receive coil such that when a playing piece is situated above both the selected transmit coil and the selected receive coil a resonance signal is generated; means for detecting the resonance signal and generating a corresponding position and type signal; and wherein each transmit and/or receive coil includes at least one winding serving for compensation arranged between opposite ends and adjacent at least one end thereof.