I was Chess champion at my high school and almost unbeatable there, I can count on one hand the number of games I have lost, I just took to it naturally.
I remember when I started College, I brought it up and the Maths professor there arrogantly challenged me and you could see he thought he would end me with ease and I destroyed him twice infront of the whole class, he was in shock both times and shook my hand.
He eventually beat me toward the end of the study year and afterwards said I was the best he had ever faced and he was smiling like a Cheshire cat that he had actually beaten me, he said he had been training alot for it on simulators, ironically that was the last game I ever played.
I have only ever lost 4 games and played well over 150-200 but never enter any major tournaments or anything so I never 'truly' tested myself.
I am also extremely good at arm wrestling, I weigh about 175lbs and I am 6ft tall and have beaten people well into 200-230lbs much to their amazement, I have only ever lost one legitimate arm wrestle and probably competed in about 100 in my life all against mostly much bigger people. But again I have never sought to find competition or enter any teams so I have never tested myself against guys who could beat me.
Funny story though, my brother will seek big guys out in clubs and challenge them on my behalf knowing what will happen, some of these guys are the shaved chest, slicked back show off guys who do not like losing and their reactions are gold when I beat them as is my brothers lol
I have actually lost 4 arm wrestles but 3 of them were when I was very drunk and not in a state of mind to do it so pointless counting them but 1 was legit and his arm was like iron.