Introduction
The lesson video is the following
Main position
During this lesson, we’ve seen it is usually a bad idea to cut an elephant eye (marked A).
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Correct moves
Black should calmly approach, making territory while harrasing white.
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This way black naturally make territory.
Wrong moves
It is super tempting to jump in and cut.
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But white will simply sacrifice one stone and build strength on the outside to counter-attack black. This one stone is very little and black lost in the exchange.