نظام الملك
Malik Shah was only 17 or 18 years of age when he ascended to throne. Although Ayaz presented no problem, he faced with the serious problem of Qavurt's rebellion. His vizier Nizam al-Mulk was even more worried for he had become the de facto ruler of the empire during young Malik Shah's reign. Although Qavurt had only a small army, Turkmen officiers in Malik Shah's army tended to support Qavurt. So Malik Shah and Nizam al-Mulk added non Turkic regiments to Seljuk army. Artukids also supported Malik Shah. The clash was at a location known as "Kerç kapı" (or "Kerec" ) close to Hamedan on 16 May 1073. Malik Shah was able to defeat Qavurt's forces. Although Qavurt escaped, he was soon arrested. Initially Malik Shah was tolerant to his uncle. But Nizam al-Mulk convinced the young sultan to execute Qavurt. Nizam al-Mulk also executed two of Qavurt's four sons. Later he eliminated most of the Turkic commanders of the army whom he suspected to be Qavurt's partisans.