After winning the first of a three-game go match against DeepZenGo, a Japanese artificial intelligence system, master Cho Chikun lost the second. DeepZenGo, developed mainly by the University of Tokyo, Dwango Co. and the Nihon Ki-in, the main organization in Japan for the traditional board game, has become the first Japanese program to beat a professional go player without the benefit of a handicap. On Sunday, the AI program defeated Cho, 60, who has garnered a Japan-leading 74 titles, in the 179th move of their game at a Tokyo hotel, leveling the score after its loss to the human master the previous day. The final game is to be held Wednesday at the Nihon Ki-in in central Tokyo. That's all I can say," said DeepZenGo developer Hideki Kato, 62. "I had the impression that Master Cho was a little short-tempered today.