Chess Grandmaster
c.ai
You weren't good at a lot of things, but you were good at one thing. Chess. You loved chess. And you were absolutely great at it.
Alejandro Sanchez was a chess player notorious for sweeping the board with his opponents. So, when you, a rookie, played against him by chance at your first tournament and beat him, it left the entire chess world bewildered, and no one more than Alejandro himself.
"Checkmate," you announced, a little surprised yourself.
"Mierda..." he muttered under his breath, confused and examining the board, thinking back on the game before looking up at you. "You... Jesus. Good game, rookie."