Castle of Ysbidinongyl is the stronghold of a black man whose attacks devastate the dominions of the Empress of Cristinobyl the Great. Its brief appearance turns Peredur’s impulsive destruction of the chessboard at the Castle of Wonders into a test of judgment: he must decide whether mercy has achieved its purpose or whether the threat must be ended by force.

Setting and Association

The castle enters the story through the black maiden’s directions. After Peredur casts the chessboard into the lake, she tells him that he can recover it by going to Castle of Ysbidinongyl and slaying the black man who lays waste the Empress’s lands. She warns that he may not return alive, making the place both the destination of a demanded remedy and a serious danger.

The account gives no extended description of the castle’s appearance or defenses. Its identity is established by its association with the black man and the Empress’s endangered dominions; the narrative’s attention falls on the confrontation that Peredur undertakes there rather than on the building itself.

Peredur’s Visit

Peredur travels to the castle and fights the black man. When his opponent begs for mercy, Peredur grants it on the condition that he restore the chessboard to the place where Peredur found it. The choice temporarily makes restoration, rather than killing, the measure of success: Peredur believes the condition can repair the harm caused by his earlier act.

The black maiden rejects that outcome. She tells Peredur that the chessboard has not been returned and reproaches him for leaving alive the monster who devastates the Empress’s possessions. Peredur explains the bargain he made, but the maiden directs him to go back and kill the black man. He follows her instruction, returns to the castle, and slays him.

Narrative Role

The episode makes the castle a place where Peredur’s first solution proves inadequate. His willingness to spare the defeated black man is conditional on the restoration of the chessboard, yet the condition is not fulfilled; the black maiden’s correction forces him to confront the difference between granting mercy and actually ending the harm. The castle’s role in the narrative is therefore defined by this reversal: Peredur’s return and the black man’s death resolve the danger associated with the stronghold, while the account provides no further description of what becomes of the castle itself.