Hou Yifan Extends Lead In Rostov

Hou Yifan won again in round four of the Rostov Grand Prix to go 4/4 and extend her lead to 1½ points.

Her latest victim was Anna Muzychuk in 47 moves of a Marshall defence to the Ruy Lopez.

The only other winner in round 4 was Kateryna Lahno who moves into second place.

The 6th August is the first rest day in the competition, so round five will be on Sunday 7th August.

The winner of each of the six Grand Prix tournaments in the series will win 6,500 euros out of a prize fund of 40,000 euros, and the overall winner will win a further 15,000 euros.

Games start at 3pm local time except the last round which will be three hours earlier. Live coverage is available at the official website at this link.

The standings after four rounds:

Hou Yifan (left) beat Anna Muzychuk to go 4/4

Kateryna Lahno beat Nadezhda Kosintseva to go second

The full regulations for the 2011/12 Grand Prix can be found here.

Pictures from the official website.