Practical Endgame Test 7 / Solution

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Analysis
Solution
Solution

Analysis

[Diagram]

Analysis

Black cannot prevent White from throwing-in at a or b and fighting a ko, and White has a ko-threat at c or d. However, both players have no ko-threats elsewhere. What Black can do is to fill up the only ko-threat.



Solution

[Diagram]

Solution

The only way to fill up the ko-threat is to play at B1. Indeed, this problem is a tribute to B2B Bomber.

[Diagram]

Solution

Since neither party has ko-threats, the upper left becomes seki. As a result, Black has 52 points and White has 46 points, so Black wins.


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