When I did it was incredibly hard. It went on for hours. I got so mad at white when I played black and vise versa. When white won because I made a mistake with black it felt like a loss even though it was also my win. And so I played several games after word vs myself and was able to see my weaknesses more clearly... though the wins and losses were even on both sides.
In the most painful way possible... I am my most ultimate and worthy rival. lol
