Entanglement

un excellent jeu d'exercice mental

this one?? where i hang out on the internet a real somebody shows up with tricks like these curves and the idea is to see what the next guy does with it,.. i suppose??,.. so this is what i made of a thing that i seen online. when i think about what is going on. i could see this helping people concentrate on things that are not this game,.. so i hope you find some use to it and have fun at the same time.