the 5th Game Programming Workshop in Japan, 1999 TR-99-32 Re eived 07 O t 99 Strategies Explained Ian Frank Ele trote hni al Laboratory Ma hine Inferen e Group Umezono 1-1-4, Tsukuba Ibaraki, JAPAN 305 David Basin Institut f ur Informatik Universitat Freiburg Am Flughafen 17 Freiburg, Germany Abstra t For many problem-solving tasks, it is important not only to produ e solutions, but also to j...