New Delhi, Nov. 22 -- Last year, a woman from Chennai reached out to Coimbatore-based Arvind Sundar on Instagram. Her 13-year-old son was an aspiring artist and an ardent follower of Sundar's work, which are inspired by mathematical concepts like grids and geometry. She requested the artist to visit their home during his next trip to Chennai. The teenager's father turned out to be chess grandmaster Viswanathan Anand. A freewheeling conversation with the family covered a broad range of topics-from international art that had moved Anand to artist Marcel Duchamp's fascination with chess, and the deep relationship between the game and mathematics. Sundar, 32, who completed his masters' in painting and drawing from University of Cincinnati's S...