The Chinese player lost her second tiebreak in the fourth round at the Baku Marriott Hotel Boulevard in the women's tournament.

Germany's Elisabeth Paehtz pulled off the upset by punishing slight mistakes early on before converting a sizeable positional advantage with a rook endgame.

Another shock in the Azeri capital saw fourth seed Humpy Koneru of India crash out.

She lost both of her rapid games against Georgia's Bella Khotenashvili, who was good value for her win making far fewer mistakes.

Ukraine's Muzychuk sisters finally found a winner as Anna defeated former world champion Mariya.

Bulgaria's Nurgyul Salimova progressed to the next stage, having prevailed over Indonesian Medina Warda Aulia 1.5-0.5 in the first tiebreaker after the latter committed a critical mistake in game two as black.

Norwegian star Magnus Carlsen qualified for the next stage but the victory did not come easily.

He prevailed against German prodigy Vincent Keymer after two tiebreak draws before finally taking a win after 68 moves.

Carlsen was in a winning position by move 23 but slipped up to lose the advantage but it did not matter as he regained his place for the win.

One of the strongest players in the world, the United States' Hikaru Nakamura, was defeated by 18-year-old Indian Praggnanandhaa.

The teenager triumphed in both of their rapid games in the first tiebreak before receiving congratulations from Carlsen despite being in the middle of his own match.