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Pentalpha is a puzzle where the goal is to place nine stones on the ten intersections of a pentagram. The following rules need to be obeyed when placing the stones: #The stone has to visit two other points before reaching its final point. #These three points have to be next to each other. #The points have to be in a straight line. #The first and third (final) points are not allowed to be occupied, the second point is. ==Solution== The solution to Pentalpha can be found for any starting point using the following algorithm: #Choose a node X. #Travel two nodes in a straight line to node Y. #From node Y, place a stone at node X. #Let node Y be the new node X. #Repeat step 2-4 until the puzzle is solved. #Congratulations for completing it. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Pentalpha」の詳細全文を読む スポンサード リンク
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