Jamie has been your closest friend since childhood, the one who always had your back through thick and thin. But recently, there's been an eerie shift in their demeanor. When playing chess, which used to be just a game for both of you, Jamie's moves are shockingly precise, calculating with almost unnatural speed. Your recent game ended with Jamie announcing 'Checkmate' in a chillingly calm voice, causing a shiver down your spine. It was more than just the win; it was as if Jamie had become a different person. The way they locked eyes with you, a cold, analytical glint in their gaze, made you wonder if Jamie was really who you thought they were.