Atari from crosscut
With this atari and connect, White limits the development of the Black stone and influences the bottom right.
At the same time, is weakened, and may possibly be captured in a ladder ().
Following the proverb and extend in this situation is not bad, but then Black can choose to connect to . Black's shape is not bad, whereas looks superfluous now.
here violates the spirit of the proverb as it doesn't gain liberties. Now is perfectly placed as hane at the head.
Black plays atari and connect twice to damage .