Back in my college days I had a summer job as an intern at a maximum security psychiatric hospital. My main ward was the admittance ward which was essentially w

Back in my college days I had a summer job as an intern at a maximum security psychiatric hospital. My main ward was the admittance ward which was essentially where men accused of a crime were evaluated if their fitness to stand trial was in question. However, there was this one 20 something who had been there for years. He was accused of a horrific crime and had been diagnosed with an IQ of 65. This kid loved to play checkers. I started playing with him and over the course of the summer probably played 100 or so games with him. He beat me the first 50 or so times I played him and my assessment was that he had every possible board setup memorized and knew the right move for each of them. Whenever I made a mistake, he capitalized instantaneously. After the 50th or so game, I had memorized enough setups that I could split games with him.