This happened in the early 90’s; I went to a sports book area to bet on a football game and when I was standing in line I noticed this old 96 year old in the back with a pad of paper watching the screens intently. After I placed my bet I walked over and sat down next to him. I watched him play and he was winning every horse race. “How are you doing that?” I asked. He pointed at the television set and said, “They play the horse races on a loop. I’ve written down who has won what race and then when the loop starts over I bet on who is going to win. It takes many hours but it’s worth it.” So we sat there for an hour or two and he would tell me what horses to bet on. We made a good deal of money. Unfortunately the casino got wise and sent down 2 security guards to 86 the man for cheating. Luckily they left me alone because they thought I was just an innocent bystander. The casinos change that policy shortly afterwards so that the horse races and everything else is live and nothing is on a loop.