Portable corrugated cardboard game board

A method of embodying a hinge in a game board formed of corrugated cardboard construction material of a type having a first exterior paper ply and a second exterior paper ply adhesively secured on opposite sides to cusps of undulating paper flutes in an interposed position therebetween, said hinge-embodying method comprising the steps of die-cutting from a corrugated cardboard substrate a game board of a selected generally rectangular shape and of a size not less than 20 inches in width and 30 inches in length, designating said first exterior paper ply as a playing surface of said game board, selecting a site for a hinge extending centrally and laterally of said first exterior paper ply of said game board, cutting a slit through said first exterior paper ply and said flutes along said hinge site only to the depth of said second exterior paper ply so as to leave intact said second exterior paper ply to function as a hinge, whereby said game board is adapted to be used on the laps of players and urged about said uncut second exterior paper ply to permit closing movement of two halves of said second exterior ply towards each other so as to reduce the dimension thereof in half to contribute to the convenience in the transport thereof.