THREE-DIMENSIONAL PUZZLE Russian patent published in 1998 - IPC

FIELD: entertaining games. SUBSTANCE: cubic puzzle has playing pieces defining three mutually perpendicular groups of layers, each containing central layer, two outer layers and four intermediate playing layers, which may cooperate one with another for rotation through cylindrical slots and ridges about branches of three-dimensional cross-member. Playing pieces of central layer are positioned for rotation on ends of cross-member. Central layer retainers are positioned between branches of cross-member, retainers of first intermediate layers are arranged on cross-member branches and on central layer retainers and retainers of second intermediate layers are positioned between outer playing pieces and retainers of first intermediate layers. EFFECT: simplified construction and increased amusing effect. 14 dwg