Main line: Hashimoto Utaro
Variations: Dieter
is the only move. After
, the points a and b are miai for life.
Related proverb: strange things happen at the one-two point - in this case you need to know which of the two 1-2 points, of course.
If White next blocks at a, Black makes a big eye at b. And if White draws out at b, Black enlarges the eye with a.
NB: if White has a stone on one of the circled points, her move at b suddenly works and Black is dead, although a lot of aji remains, because he can break out into the centre (in this position).
Grauniad: to
followed by B a, W b and B c shows that White cannot escape without an extra stone to right. Thanks to Jasonred for clarifying this.
If Black plays at the other 1-2 point, it is also wrong. and
are miai for the kill. After
, Black can play neither a nor b because of shortage of liberties.
here is also wrong. White can even respond at ease to the hanes at
and
, because whatever Black does, the points a and b remain miai for the kill.
Finally, what about making the corner eyespace as big as possible, with here? White plays hane at
, threatening to capture three stones. Black has to make a solid connection. This is as in Gokyo Shumyo, Section 1, Problem 1, but with a white stone at
, and Black is dead.
Back to Gokyo Shumyo Tsumego Series
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