Variations of Our Solution (Ib)
This is an extraction from the "Variations of Our Solution (I)" (47).
Order of Updates
After we had finished our work on the 2020 update of our website, we first analysed "Dany's Ko: Joachim's no-ko-threats", i.e. Joachim's discovery that White moves around Black's bamboo joint in the upper right are no valid ko-threats. Afterwards, we took great care to confirm our assumption that the guzumi must be played at the latest before the Crosscut Sequence in the left centre, and must by no means be delayed as much as the original KataGo version (2019) had still assumed. | |
In mid-December 2020, Friday9i provided us with a first version of the special network for Igo Hatsuyôron 120 that he had further developed / trained – KataGo (2020). KataGo (2020) not only confirmed Joachim's assessment of "Dany's Ko: Joachim's no-ko-threats", but also found another, fourth, ko-threat for White in the upper left corner. KataGo (2020) now basically played the guzumi "early", confirming our assumption in this regard. | |
During our further work on "Tricking KataGo (Triple-ko)", with the tsuke of Yamada Shinji played, Joachim found various improvements for Black. | |
In June, I started to analyse the main path of Our Solution with the then current new network. If the Guzumi is played at the earliest possible moment, KataGo offers an alternative variation in which White does not answer this move locally, but instead stabilises her position at the bottom against the growth of the hanezeki's tail. In the course of this analysis, I discovered that the crosscut after Yamada Shinji's tsuke could also be played the other way round, starting with an inward tsuke. With "Tricking KataGo (Triple-ko)", KataGo (2021i) now captures the nakade "early", and handles the fight in the upper left corner better than before, as it encountered this position sufficiently during its extended training. KataGo (2021i) found several improvements for "Dany's Ko: Joachim's no-ko-threats", in particular ending Dany's Ko "early". This implies that Dany's atekomi does not work any longer for White. For "No Early Kikashi (2021)", KataGo (20201i) found improvements for White, as well as for Black. |
Colours of the Boards' Edges
Darkgrey = 6 Main Semeai Liberties: | |
Darkred = 7 Main Semeai Liberties: | |
Brown = 8 Main Semeai Liberties: | |
Pink = 9 Main Semeai Liberties: | |
Lightgrey = 10 or more Main Semeai Liberties: | |
Lightbrown: | |
Darkbrown: | |
Cyan: |
Colours of the Boards
Golden: | |
Brown: |