Failure
Direct countermeasures against the cut fail. Black strikes at the 1-2 point. The enemy's key point is yours, so ...
Variation 1
White lives by taking both 1-2 points. After , a and b are miai.
Variation 2
If takes the second 1-2 point, White protects the cut.
Dieter
Sub-pages (up)Hint
Referenced byKanazawaProblem96