Indianhead Mountain The area is best known for downhill alpine skiing. Indianhead itself only offers downhill alpine skiing. Indianhead features runs from very easy greens through double diamond. Over 95% of the hill is groomed, and although there is no official tree skiing, adventurous skiers manage it anyway. There are 10 Beginner Green runs (the largest, Voyagers Highway is in itself the size of many Midwest ski areas), seven More Difficult Blue runs, seven Most difficult Black runs, and four Expert Double Diamond runs primarily because of moguls. The facilities normally found at the hill base are on top of the hill
Expert Simon and Kevin Gilmartin proposed a model of learning in chess called MAPP (Memory-Aided Pattern Recognizer). Based on simulations, they estimated that about 50,000 chunks (units of memory) are necessary to become an expert, and hence the many years needed to reach this level. More recently, the CHREST model (Chunk Hierarchy and REtrieval STructures) has simulated in detail a number of phenomena in chess expertise (eye movements, performance in a variety of memory tasks, development from novice to expert) and in other domains. An important feature of expert performance seems to be the way in which experts are able to