Yin and Yang (2019) 
When we started to work with KataGo's new moves, we were so convinced these would commit White to the Capture Variation, that we had completely lost sight of the Semeai Variation for a while. However, the Semeai Variation is intrinsically tied to the Capture Variation, as is the White group on the left edge to the Black group in the top right. Destroying opponent's potential territory that is located outside the Main Semeai area has an identical effect on both the Capture Variation and the Semeai Variation. This implies that this destruction can be got for free. Opponent's potential territory can also be destroyed inside the Main Semeai area, but this kind of destruction is costly. In principle, the destructor has to pay in liberies in the Capture Variation, but in points of territory in the Semeai Variation. And, of course, liberties and points are also different sides of the same medal. In the following diagrams we compare gains and losses between Our 2015 Solution and Cheng's classical 1988 solution (we preferred Cheng 1988 to Fujisawa 1982, because Cheng played through the Main Variations until the end) and between the new KataGo-assisted 2019 solution and Our 2015 Solution. Legend: | |
Our Solution 2015 vs. Cheng Xiaoliu 1988 | ![]() |
KataGo 2019 vs. Our Solution 2015 | ![]() |
Joachim's Oki – An Unexpected Blind Spot | ![]() |
A Forced Waiver | ![]() |
A 50 Percent Approach-Move Liberty | ![]() |