Black has one eye at the circled point.
makes miai of the capture at a and the connection underneath at b, capturing two stones.
Black makes a second eye with , and two points there. White can play neither at a nor at b because of shortage of liberties.
White makes four points capturing the stones, and one point at the circled points (Black has to throw in a stone to prevent an eye).
The difference between the two variations is (5 - 2) - (7 - 4) = 0. So White can decide her answer according to the global position.
Bill: On the assumption that
in the Variation 2 diagram is White territory, I calculate that the capture on the side is 2/3 point better for White.
The vulgar atari of is a painful mistake. It's a so-called anti-suji, missing completely the proper line of play.
White answers at and the connection underneath at a doesn't work any more. White must not play anti-suji with
at b, for Black will descend to c and make the connection work again.
I don't see why not.
I think it is also possible to descend in the corner first, might lose a point though.
White 2 at a gives white the other direction. (black d at 6)
Alex: Then this might work.
tderz
=a ... which only creates a false eye (+ ko
=a),
worse than unconditional life
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