Indian Grandmaster R Praggnanandhaa played out a draw with Duda Jan-Krzysztof of Poland to maintain joint lead with 3.5 points but compatriot D Gukesh lost a tense battle against Alireza Firouzja of France in the sixth round of Superbet Chess Classics, a part of the grand chess tour. Playing the black side of an English opening, Praggnanandhaa was subjected to some initial tactics by Duda, who is looking forward to come back in the event, but the Indian was quite up to the task in not giving any free-way to his Polish opponent.