The allotted time for the computer was 25 minutes and then 10 seconds per move. On April 20, 2013, GPS Shogi defeated 8-dan professional shogi player Hiroyuki Miura in a 102-move game which lasted over 8 hours. On December 13, 2015, the highest rated player on Shogi Club 24 was computer program Ponanza, rated 3455. On April 10, 2016, Ponanza defeated Takayuki Yamasaki, 8-dan in 85 moves. Takayuki used 7 hours 9 minutes. In October 2017, DeepMind claimed that its program AlphaZero, after a full nine hours of training, defeated elmo in a 100-game match, winning 90, losing 8, and drawing two. From a computational complexity point of view, generalized shogi is EXPTIME-complete. Video games Hundreds of video games were released exclusively in Japan for several consoles. Clubhouse Games: 51 Worldwide Classics was released internationally by Nintendo in 2020 for the Nintendo Switch console, offering both Shogi and mini Shogi variants using either traditional or bilingual pieces. Culture According to professional player Yoshiharu Habu, in Japan shogi is viewed as not merely a game as entertainment or a mind sport but is instead an art that is a part of traditional Japanese culture along with haiku, tanka, noh, ikebana, and the Japanese tea ceremony. Its elevated status was established by the iemoto system supported by the historical shogunate. In Japan, Shogi is one of the most popular board games, with a player population that some say exceeds 10 million. Go has 3 million players, and Western chess has 20,000 players. The backwards uma (shogi horse symbol) is often featured on merchandise (such as on large decorative shogi piece sculptures, keychains, and other keepsakes) available for sale in Tendō. It also serves as a symbol of good luck. (Cf. Rabbit's foot.) There are multiple theories on its origin. One is that uma (うま ) spelled in the Japanese syllabary backwards is まう mau (舞う), which means (to) dance and dancing horses are a good luck omen. In popular culture In the manga and anime series Naruto, shogi plays an essential part in Shikamaru Nara's character development. He often plays it with his sensei, Asuma Sarutobi, apparently always beating him. When Asuma is fatally injured in battle, he reminds Shikamaru that the shogi king must always be protected, and draws a parallel between the king in shogi and the children who would grow up to take care of the Hidden Leaf (Konoha)