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Akiko Tsukuda (L) of Japan competes with Natalia Kovaleva of Russia during the quarterfinal match at Senko Cup World Go Women's Championship 2019, in Tokyo, Japan, Feb. 22, 2019. (Xinhua/Du Xiaoyi)
Akiko Tsukuda (L) of Japan competes with Natalia Kovaleva of Russia during the quarterfinal match at Senko Cup World Go Women's Championship 2019, in Tokyo, Japan, Feb. 22, 2019. (Xinhua/Du Xiaoyi)