Headspace is a 2005 film directed by Andrew van den Houten. The screenplay was written by Steve Klausner and William M. Miller, based on a story by Troy McCombs. A young genius becomes obsessed with beating a chess wizard. He has a mind which uses far more of his frontal lobes than any normal person which means he can memorise a book in seconds. It also causes him to have fits which endanger his life. It is something to do with his mother who had a similar genius which turned her mad and forced her husband to kill her to save himself and their two sons. Psychiatric treatment does not seem to be working for him and meanwhile a monster is killing the people he knows. Although it is not revealed till near the end, you will quickly guess that the chess genius is his long lost brother. What is puzzling though is does the monster really exist or is it just a product of his imagination, and if so, how is it killing people?