Viswanathan Anand has revealed an interesting aspect about R Praggnanandhaa, beat current world champion Magnus Carlsen on Monday. "He is very fun-loving, likes to crack jokes. He likes to fool (around) a lot. I think it's his way of dealing with tension. And this is quite nice. RB Ramesh, his permanent coach, knows how to keep him in the right frame of mind. He is quite playful when he is with his sister or family. That helps him ease the tension," Anand said.