What are the conflicts and the climax of "The Cask of Amontillado"?

The prime conflict of "The Cask of Amontillado" concerns
Montressor's anger at Fortunato and the decision by Montressor to kill him. Although the
narrator (Montressor) never tells the reader what Fortunato had done to earn his wrath,
we do know that some recent insult prompted Montressor's revenge. Montressor must find a
way to kill Fortunato without being found out: A "perfect crime" must be enabled.
Montressor plots his crime in a patient, step-by-step method, luring Fortunato into the
Montressor catacombs with the promise of a rare bottle of Amontillado. Once he gets
Fortunato into position, the climax occurs: Montressor chains him to the ground, walls
up the small "niche," and leaves Fortunato to die.