An eventful fourth round at the Cairns Cup saw both co-leaders losing their games, allowing Anna Zatonskih to climb to sole first place in Saint Louis. Zatonskih defeated Alexandra Kosteniuk from the black side of a French Defence, while Bella Khotenashvili got the better of Irina Krush, who had caught Kosteniuk in the lead after winning her round-3 encounter. The third decisive game of the day saw Nana Dzagnidze beating Humpy Koneru. | Photo: Crystal Fuller