When the rest of kids his age are learning that ‘a’ is for apple and ‘b’ is for ball, three-year-old Sarwagya Singh Kushwaha has already started thinking that ‘c’ is for checkmate. When Sarwagya plays chess, he thumps his pieces on the squares and slaps the clock with a particular menace, which would indicate that he is trying to rattle his opponent. But the fact that he has to stand up on his chair, or sit on three chairs stacked one over the other, just to reach the other end of the chess board is a dead giveaway of the boy’s tender age. At the age of three years, seven months and 20 days, Sarwagya is now the world’s youngest rated player in chess history. Hailing from Madhya Pradesh’s Sagar, Sarwagya is still in nursery school but holds a rapid rating of 1,572. He dethroned Kolkata’s Anish Sarkar, who, in November last year, had become the youngest rated player in history at the age of three years, eight months and 19 days. Having picked up …