Variations of Our Solution (IIIa)
No Early Kikashi
VAR (.1) (.2) (.3)
: ( 648fg) In this subvariation, we (once) assumed that White does not want to play at in the hanezeki. | |
: ( 138 648fi) She will increase her result in the Semeai Variation - despite still losing the ko fight - if she splits the Nakade Sequence, and recaptures the ko in the left centre, instead. : Please note that we will not split the following diagrams for adjusting the board's border colour after a ko threat is played that loses at least one Main Semeai Liberty. | |
: : If she mistakenly played the atari of at the left edge, Black would cut at , killing all White groups in the hanezeki. White would be forced to capture the hanezeki's tail (otherwise Black could safely connect it), losing the game by about 5 points. | |
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: : If White chose Dany's Sacrifice just now, and connected the ko in the left centre, Black would capture with and White would achieve only a drawn game in the Capture Variation. Black's large group in the upper right would survive the Semeai Variation (due to White's loss of two Main Semeai Liberties by her sacrifice). ; :
We now know that this kikashi cannot be counted as an additional ko threat - in the case that we had played Black's atari at before starting Dany's Ko, in order to generate additional Main Semeai Liberties for Black. |
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: : Black's ko threat in the upper right corner - found by Joachim - costs Black one move overall (i.e. an additional prisoner for White) and one tempo in the Main Semeai. |
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Black plays 1/1 reduction. | |
Capture Variation: Compared to the superordinate variation ...
In total, White gained four points. Black + 3 => White + 1 | |
Semeai Variation: Compared to the superordinate variation ...
In total, White lost two points. White + 1 => Black + 1 | |