(Also see problem 22347. Edit: About a week after I posted 22347, Starline pointed out to me that it was a duplicate of santa c's problem 7921. Thank you to Starline for pointing this out, and sorry to santa c for the duplicate.) Please flag or comment if there is a mistake.
C [White just played the triangled stone. How to defend?][FORCE] LB [ra:A][sb:B]
(; B [ra]; W [sb] (; B [qa]; W [oa])(; B [sc]; W [oa]; B [sa]; W [pa] (; B [qa]; W [se])(; B [rb]; W [se])(; B [se]; W [rb] C [Black succumbs to damezumari (lack of liberties).] TR [qa][sb])))
(; B [sb]; W [ra] C [Since you chose the right answer, I will assume you read it out (Hopefully you didn't guess : p). Only correct moves are included.]; B [qa]; W [se]; B [sa]; W [sd]; B [oa]; W [rb]; B [ra]; W [sf]; B [sc] C [Well done!][RIGHT])