South Korean Go Pro Shin Jin-seo Beats AI KataGo in Second Game

South Korea's top Go player, Shin Jin-seo, beat the AI program KataGo in a formal match at the Korea Go Association's tournament. He was given a two-stone handicap, a first for a pro in such a setting. The game used four RTX 3090 graphics cards. Shin had five hours plus a 30-second count, while KataGo had to move every 20 seconds.

In the first game, Shin lost. But in the second, he started with a 99% win rate and an 18.5-point lead. He used a big opening pattern to limit the board. KataGo fought back, but Shin kept his lead until the 150th move. Mid-game, he cut off KataGo's stones, though his win rate dropped to 89% at one point. He found a winning path.

The match lasted about 4 hours and 50 minutes, ending on move 290. Shin won by 4.5 points, tying the series 1-1. The final game is on the 21st.