Two more chess cheating stories. My favorite all time was when a lower level master was having a great tournament and had beaten several much higher rated players. His final opponent noticed that whenever the position got complicated, he would take a bathroom break, which is a pretty big giveaway. He followed his opponent to the bathroom, sat in the adjacent stall, and reported to the tournament director that he "didn't hear any bathroom noises.". The td waited until the guy was finished, inspected the toilet and found a smartphone taped to the underside like a gun in a mob movie. I was playing in a small tournament in Springfield, Ill., like 12 years ago. Way smaller and less serious than pro level stuff, just renting out a banquet hall, setting up some tables everyone pays $20 and the top prize is like $120. I had won the tournament the year before and was 2-0 this time. I got paired with a young teenage kid whose dad sat on the sidelines with a laptop. We were playing a rather famous opening that most serious chess players would know 15+ moves deep (Ruy Lopez marshal counter), and the kid was slamming down each move instantly, showing he knew the line really well. I happened to know a divergence around the 10th move that isn't quite optimal but it gets players out of their comfort zone of memorized lines. I play that move, and the kid immediately frowns and stops playing instant responses. He tanks for about 5 minutes, then his dad comes over, shows him a page from the Harry Potter book his dad had on his person for some reason, and they both leave the playing hall. They were gone for over 20 minutes, and I couldn't find them in the bathroom or anywhere else in the building. When they finally came back, the kid played the rest of the divergent line perfectly. It was incredibly obvious what happened, but I figured if I complained, they would just deny it and there's not really anything that could be done, and the TD is just some dude who rented the hall and reports results to the USCF, he doesn't need a bunch of drama. So I let it go.