The ability to detect subtle opponent reactions and set increasingly subtle traps is a refined skill developed through practice.

“my opponents would would mess with my mind and trap me and trick me and make me think here and then they go there and then I would learn to do that and then I remember there was one like youth competition where I made a move in had a trap went oh I mean it was like that obvious right it's like the worst like and then it gets increasingly subtle right but like and my opponent said oh he's unhappy took the pawn then you and then your opponent see it and then you learn you know those things keep on the circles get smaller and smaller and Tighter and Tighter and more and more refined”