Shortage of liberties exercise 1
Based upon 1001 Life and death problems; Page 169, problem 693, solution diagram
First posted as an alleged erratum.
... continuing from Diagram 1, White sacrifices a stone at , placing Black in a shortage of liberties.
If , capturing the White sacrifice stone, White plays , threatening to capture either two Black stones or four Black stones. Thereby forming two eyes.
Unfortunately, the alleged erratum is an erratum in itself.