Grandmaster R Praggnanandhaa (PTI Photo) Indian Grandmaster R Praggnanandhaa continued his strong run in St. Louis as he defeated World Championship challenger Javokhir Sindarov in the second round of the Sinquefield Cup to move into a share of the lead.The 20-year-old secured the full point after a marathon battle in which neither player was able to establish a clear advantage for much of the game. The contest eventually turned in Praggnanandhaa's favour when Sindarov made a costly mistake on the 82nd move.Praggnanandhaa responded with a sequence of precise...