![]() StartingPoints Referenced by
|
Teaching Game 67, Tsumego after W52
PageType: OngoingGame
Difficulty: Beginner
Keywords: Life & Death
This was the situation in the TeachingGame67 after White 52 (the marked stone):
The white group on the right side is an example of a three-spaces notcher. But real-life Tsumego is complicated by the surrounding positions: fortunately this time, White has an ally in the lower right group: a white move at c threatens to link up there with the sequence White d, Black e, White f. Therefore White can work out a ko this way:
Needless to say, this is a picnic ko for Black, i.e. he risks very little (also because he gets to capture first), while White risks a lot.
The sequence Joe believed could lead to a seki is probably this one: JoeSeki Indeed it was what I thought was a seki. I saw the aji of c and thought that gave me enough time, either to escape to the bottom, or make a big enough space to get a seki.
This may look like a seki, but it is not: Black has made an Eye in the belly of White's group: she cannot capture those stones or else she ends up with a space almost filled with a dead shape, while Black can always occupy all the external liberties, then play a and b to put the group in atari.
The problem of making life for this group could probably have been solved earlier by playing differently after I connected with the marked stone in the diagram below, by expanding the space starting at the other side:
This should be alive, but this sequence has the drawback of Black 2, which weakens the lower right white corner. This is a copy of the living page "Teaching Game 67, Tsumego after W52" at Sensei's Library. ![]() |