PROBLEM TO BE SOLVED: To provide a development puzzle as a game toy useful for dementia prevention, rehabilitation training and intelligent growth of an infant by activating the brain and growing concentration.;SOLUTION: The game is performed by first selecting two letters as a start point and a finish point from among 16 alphabetical letters (3) arranged on the outer periphery of the squares (2) of a panel (4) and filling 16 squares (2) with 16 pieces (1) between them for developing a passage. In the case, as for the cut face of the passage of the piece (1), only two pieces have to be in contact with the previously selected alphabetical letters (3), and all of the other pieces have to be connected by their insides.;COPYRIGHT: (C)2005,JPO&NCIPI
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