Efficiency Example 1

  Difficulty: Intermediate  
[Diagram]

Which answer is more efficient, A or B?

[Diagram]

Choice A

[Diagram]

Choice B

White's options have greatly increased here. She can cut at A and hane at B later.

[Diagram]

Efficiency

In the first diagram, with respect to the second, Black got the marked exchange (plus an unplayed stone for White's circled one). Clearly Black's moves are more valuable and therefore Black's efficiency is much better.


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