American Go E-Journal

by John Power, Japan Correspondent for the E-Journal

The 5th Electric Sage tournament: This is a tournament in which go-playing computer programs challenge human players. The tournament is organized by the Entertainment & Cognitive Sciences Research Station at the University of Electro-Communications and was held on March 26. The Chinese program FineArt and the Japanese program DeepZenGo both played games with Ichiriki Ryo 7P and both won.
This was the first time that the games were played on even. In the previous four terms, the results had been 50-50 with programs taking four or three stones. FineArt took black against Ichiriki and secured a resignation after 157 moves. DeepZenGo took white and won by resignation after 162 moves. An interesting point came up in the endgame of FineArt’s game. It could have won big by playing a move that would have won a capturing race, but it played a small endgame move that still gave it a win. The program doesn’t “care” what the winning margin is so long as it wins.

Motoki to challenge for Honinbo: All the games in the final round of the 72nd Honinbo League were played on April 6. Three players were still in the running to win the league: Motoki Katsuya 7P on 5-1 and Ko Iso 8P and Hane Naoki 9P, both on 4-2. Motoki was in the best position, as he would qualify for a play-off even if he lost. As it happened, he was matched against Ko. Taking white, he beat him by resignation, so he avoided a play-off.  On his debut in the previous league, Motoki (at left) surprised fans by taking second place; this time he improved on that and will make his title-match debut. Becoming the Honinbo challenger also earned him promotion to 8-dan (effective as of April 7).
Hane (B) beat Cho U 9P by resignation; his 5-2 score earned him second place, a big improvement on the previous league, in which he lost his place. Cho ended on 3-4 and lost his place. Yamashita Keigo 9P (W) beat Takao Shinji Meijin by resig. The former took third place with 4-3, and the latter, the number-one ranked player in the league, lost his place with 3-3. The final game was between two players who had already lost their places: Yuki Satoshi 9P (B) beat Mitani Tetsuya 7P by 2.5 points. Yuki ended on 2-5 and Mitani on 1-6.
Motoki, aged 21 (birthday on August 2), is considered one of the contenders in the post-Iyama group, mainly because of his performance in the Honinbo League. He has won one junior title, the 9th Hiroshima Aluminium Cup in 2014. The title match with Iyama will start on May 9. At 21 years eight months, Motoki will be the third-youngest challenger, following Ida Atsushi (20 exactly) and Cho U (21 years three months). Motoki has not yet played any official games with Iyama, but he mentioned that he had lost all of the ten or so unofficial games they had played.

Iyama leads Meijin league: Not surprisingly, in view of his sextuple crown, Iyama Yuta started out as the favorite in the 42nd Meijin League and he has lived up to that billing. After five rounds, he is the only undefeated player; he has already had his bye, so his score is 4-0. His closest rival is Yamashita Keigo, who is on 4-1. The two will play each other in the 7th round, which is in June.
Recent results:
(March 27) Iyama (B) beat Hane Naoki by resig.; Yamashita (B) beat Kono Rin by resig.
(April 13) Iyama (B) beat Kono Rin by resig.; Yamashita (W) beat Cho U by resig.