Variations of Our Solution (IIIb)
Tricking KataGo (Triple-Ko)
VAR (C) (A) (.2) (.2)
(Referenced by 222gh) : ( 222ao) We will discuss Yamada Shinji's tsuke in the modern line of play, i.e. with Guzumi Exchange, in detail later ( 222gh). | |
: ( 102 222bc) As we know now, cutting at , instead, is better for her. : ( A 222bq ; 103 222br) However, he would gain one point overall, if he descended to , instead. Please note that Yamada Shinji found his improvement over the "classical" atari in an aera, when the endgame at the left side was played "late". Once the lower border of Black's upper left corner was settled, none of KataGo's current findings would be applicable any more, and playing at would be feasible. : ( 103 222bs) However, as we know now, it would be better for her to immediately force by connecting at . : ( 105 222bt) However, with his upper left corner severly weakend by the unsettled border at the left, he should better give atari at White's cutting stone from the inside. : ( 105 222bv ; ((B 222ds) KataGo recommends playing at , instead, which will give Black a very nasty surprise. In the beginning of our investigations, I once assumed that the ensuing ko fight (in the subvariations) would be easier to handle for White without than with Guzumi Exchange, because White would be able to use liberty-occupying moves of the Main Semeai as ko threats. Following Joachims suggestion of capturing the nakade "early" - just before initiating the fight in the upper left corner - will drastically change the character of the ko fight in the upper left corner in White's favour. : ( C 222ed) However, it would be better for her to insert the atari of in the upper left before. | |
: (A 222ej ; B 222en) Capturing White's two stones in the lower left with , instead, would be too early. White would benefit by one point overall. The same is true for pushing with in the upper right. : | |
: (117 222eo) Here, in the line of Yamada Shinji's tsuke, she should not connect her two stones with , instead, as she would be unable to play the wedge in the left centre (shown below) thereafter. Black would gain one point overall unnecessarily. : ( 119 222ep) However, she would benefit by one point, if she played the wedge at , instead. : The final scores of the game will become Jigo / Black + 3. | |