> This robot hand will beat you at rock-paper-scissors 100% of the time. It can recognise a competing hand gesture in 1 millisecond and move its own hand to mak

> This robot hand will beat you at rock-paper-scissors 100% of the time. It can recognise a competing hand gesture in 1 millisecond and move its own hand to make the winning gesture to complete at the same time. This is one of those things that is surprisingly un-hard, though I don't claim a 100 % success rate. On a non-competitive level, people tend to open into their choice on the way down. The strategy I use is to look for if their fingers unfurl, and then I immediately fold out scissors. In all other cases I keep a fist. This works because paper is such an obvious shape even early on in the movement. If their fingers go out, they are doing either paper or scissors, which will on average be beaten by scissors. If their fingers don't go out early, it's either scissors or rock, which on average is beaten by rock.