OTF: Main line (1)
to sequence is natural. Next sequence may be the real problem.
OTF: Main line (2)
, , and sequence is critical. White cannot move to a because of shortage of liberties.
OTF: wrong order - Failure
For first, White can live.
OTF: Easy to mistake
instead of a is a mistake, too. White can catch by oiotoshi.
OTF: Attempt
For , white can live at least by ko.
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