
Yu Yangyi (R) of China and Potkin Vladimir of Russia compete during the 1st Edition of BRICS Chess Masters in Fufeng, northwest China's Shaanxi Province, April 26, 2017. (Xinhua/Zheng Xin)

Yu Yangyi (R) of China and Potkin Vladimir of Russia compete during the 1st Edition of BRICS Chess Masters in Fufeng, northwest China's Shaanxi Province, April 26, 2017. (Xinhua/Zheng Xin)