# Gokyo Shumyo, Section 1, Problem 7 / Solution

A tesuji

Black has one eye at the circled point. makes miai of the capture at a and the connection underneath at b, capturing two stones.

Variation 1

After the connection underneath, White can't give atari at a.

Continuation

Black makes four points capturing two stones, while White makes seven points (circled + captured).

Variation 2

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.

At 'a' is wrong

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.

Losing points

Forcing White's answer with loses points. There is no need for Black to lose the stone at .

Losing more than points ?

Can't White answer this way? (=a)

I don't see why not.

Missing a point?

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)

Missing a point?

What if white takes the point?

Alex: Then this might work.

Missing a point?
false eye

tderz =a ... which only creates a false eye (+ ko =a),

```worse than unconditional life
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