In sole lead with a comfortable advantage of 2.5 points, Indian Grandmaster R Vaishali will take on Tingjie Lei of China in the fifth round of the Norway chess tournament in Stavanger, Norway. Having amassed 8.5 points from the first four rounds, Vaishali is ahead of women's world champion Wenjun Ju of China and Anna Muzychuk of Ukraine in the USD 1,61,000 prize money tournament. With each win under Classical time control worth three points here, Vaishali has largely benefitted from victories over compatriot Koneru Humpy and veteran Pia Cramling.