A Middlegame Lesson

In an average middle game position there are about 40-50 legal moves. A beginner will look at a position and work out the legal moves one by one, perhaps overlooking the most important. An intermediate player will look at the position and see all legal moves without too much trouble, but will have some problem determining which moves are worth further consideration and which aren't. A master will look at the position, will see all of the legal moves without even thinking about them, will quickly decide which side is better, and will start examining the most promising continuations.