Chess: Hikaru Nakamura is sole leader at Tata Chess

World number three Hikaru Nakamura showed his class in the blitz while India's youngest Grandmaster R. Praggananandhaa impressed with two wins in the Tata Steel India Chess here on Tuesday. Nakamura secured four wins and five draws to stay as the sole leader after nine rounds.On a penultimate day, five-time former world champion Viswanathan Anand