TsumegoFromGames146/Attempts

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[Diagram]

Ko - black takes first

[Diagram]

Ko - black takes first

fractic: I don't think the order is right. This B4 is better. White should play W3 before W1.

Herman: If white plays W3 before W1, it fails ompletely. tapir's solution is correct, but white should play W5 in the first diagram immediately, rather than first playing W3.

tapir: Indeed. Visualising with removing stones is difficult for me.

[Diagram]

Still ko - black can't help it + white takes first, inferior for black

[Diagram]

Ko - white takes first, inferior result for black

[Diagram]

Ko - black takes first

Herman: Correct! Note that white can play W5 at a for a sente seki, but that will usually be inferior (if it were superior, white black should play as in diagram 1 and allow that ko (which black takes first).


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