This was my experience on a long Delta flight, I don't remember if I picked easy or not but it was laughably bad. I took its lunch money for a game and then turned the screen off. I was mostly irritated by the horrible touch interface, it felt so laggy among other issues. (I don't have a ranking, I barely play these days and usually just in person, but my memory says around 1400 back in the yahoo chess days as a teen but it's probably closer to 1000 now.)