International grandmaster Arnold Denker studies the pieces on the board in front of him.

国际大师级的零碎阿诺德思想家的国家研究在黑板上在他的面前。

youdao

International grandmaster Arnold Denker studies the pieces on the board in front of him.

国际大师级的零碎阿诺德思想家的国家研究在黑板上在他的面前。

youdao