Game board for electronic games

A game board (30) for electronic games such as electronic chess has a sensing sandwich (14) comprising upper and lower membranes (16, 18) which are normally held apart by an electrically insulating spacer (20), optionally of elastomeric material. The spacer has been formed by printing. The membranes have conductive regions (22) which contact one another to provide a closed electrical path when one or other membrane and/or the spacer deflect because of the presence of a playing piece (36). The deflection can be caused by the weight of the playing piece, or by the playing piece being pressed down by the player, or by the attraction of a magnet (38) in the playing piece to a metal plate (34) beneath the sandwich.