To prevent the pieces missing and simplify the configuration of a game by arranging the cylindrical pieces with identifying elements of a specific number of kinds on their peripheries to partly protruding from holes in regular, horizontal and vertical rows.

The main body consists of a bottom plate 4, a side plate 2, a cushion 5 and a board surface 1 on which holes are regularly formed in horizontal and vertical rows. Pieces 3 whose peripheral surfaces each are provided with five kinds of identifying elements are partially housed in the holes on the board surface 1 so as to partially protrude. Each player points out one of the identifying elements of the pieces 3, turns up the pointed identifying element, forms one of four at each center and one neighboring piece into a windmill shape and rotates unpointed identifying element to turn up the pointed element one by one in turn. The game is played by sandwiching the identifying elements of others and changing into one's own element. The game is played according to the rules and competed by the number of the pointed identifying elements which are turned up.