Variations of Our Solution (Ib)
KataGo's 2021 Solution
VAR
(.3)
(.3)

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... | |
However, Black would benefit by one point in the Semeai Variation, if he chose the descent to As a matter of course, Black's best option here would be the block at | |
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White would benefit by one point in the Semeai Variation (compared to Black's best line of play below), if she connected her two stones in the lower left with | |
Black would be one point better in the Semeai Variation, if he defended in the left centre, instead.
He would lose decisively overall, if he connected above, with
Counter-intuitively, he must not defend his formation in the upper left centre, quite contrary to the situation some moves before.
Otherwise, White would be able to turn Black's lower left corner into a seki, as we have already seen in the subvariation above for Black's connection at | |
Black plays 2/2 reductions. | |
Capture Variation: Compared to the superordinate variation, ...
In total, White gained one point. White + 1 => White + 2 | |
Semeai Variation: Compared to the superordinate variation, ...
In total, White gained two points. Jigo => White + 2 | |