{Details of game boards, e.g. rotatable, slidable or replaceable parts, modular game boards, vertical game boards with slidable parts of the playing surface with two or more slidable parts, e.g. parallel on different levels}
{Details of game boards, e.g. rotatable, slidable or replaceable parts, modular game boards, vertical game boards with slidable parts of the playing surface with two or more slidable parts, e.g. parallel on different levels}