Abu Sa'id's successor Arpa Ke'un executed her. Arpa Ke'un's position proved to be weak; when a granddaughter of Chupan, Delsad Katun, fled to Diyarbakr, it caused the governor of that region to attack and defeat the Ilkhan. During the strife that occurred in the next few years, individual members of the Chobanids sided with various factions, such as Arpa or Hasan Buzurg. The latter ended up marrying Delsad Katun, who provided for the heirs to the Jalayirid position. While the Jalayirids were consolidating their position in Iraq, however, other Chobanid were also busy. Hasan Kucek, a grandson of Chupan, rallied much of the Chobanid family to his side and defeated the Jalayirids in 1338, paving the way for a Chobanid realm in the area around Tabriz. That same year, he elevated Sati Beg, sister of Abu Sa'id and widow of Chupan, to the Ilkhanid throne. To keep Sati Beg in check, he forced her to marry his puppet Suleiman Khan. Hasan Kucek continued to fight the Jalayirids (a fight which was further complicated by the incursions made by Togha Temur of Khurasan), but family infighting proved to be the most difficult challenge. Several members defected to the Jalayirids; in any case, Hasan Kucek was forced to deal with them up until his death in 1343. A power struggle quickly emerged after Hasan Kucek's death. During the dispute, Hasan Kucek's brother Malek Asraf gained the upper hand and eliminated his uncles. By the end of 1344, Malek Asraf had gained effective control of the Chobanid lands. Like his predecessor, Malek Asraf used puppet monarchs from behind which he ruled. During his reign, the Chobanid attempted to capture Baghdad from the Jalayirids in 1347 but failed miserably. He also failed to seize Fars from the Injuids in 1350. As his reign wore on, Malek Asraf became more and more cruel, prompting widespread dissatisfaction amongst his subjects. When forces of the Golden Horde overran the Chobanid realm and captured Tabriz in 1357, few lamented the loss of power by the Chupanids. Malek Asraf was executed, and his family brought north to the Golden Horde.