A second successive top-board victory with the dark pieces brightened Karthik Venkataraman’s prospects of winning the National chess title here on Tuesday. A day after upstaging Abhijeet Gupta in an unusual finish, Karthik benefited from a dubious rook-for-knight trade-off by country’s latest Grandmaster Koustav Chatterjee on Monday and won in 35 moves. On a day when the top-four boards saw …
