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Yuta Iyama of Japan competes during the quarterfinal match against Jiang Weijie of China at World Go Championship 2019, in Tokyo, Japan, on March 18, 2019. Yuta Iyama won and proceeded to semi-finals. (Xinhua/Jiang Yucen)
Yuta Iyama of Japan competes during the quarterfinal match against Jiang Weijie of China at World Go Championship 2019, in Tokyo, Japan, on March 18, 2019. Yuta Iyama won and proceeded to semi-finals. (Xinhua/Jiang Yucen)