His two main rivals were warlords named Kobyak and Konchak, according to the Hypatian and Laurentian Chronicles.  
His two main rivals were warlords named Kobyak and Konchak, according to the Hypatian and Laurentian Chronicles.  Edward Keenan of Harvard argues that the most famous literary work describing this man was a forgery by the 18th-century Czech writer Josef Dobrovsky, but Roman Jakobson argued for the work's authenticity by comparing it to the Zadonshchina.  Eventually named ruler of Chernigov, he and his brothers set out in 1185 on a failed expedition against the Kumans, who were immortalized in an operatic dance 700 years later under the name of Polovetsians.   FTP, name this Kievan prince whose life became the subject of an early Russian epic poem and an opera by Aleksandr Borodin.
His two main rivals were warlords named Kobyak and Konchak, according to the Hypatian and Laurentian Chronicles.  
Prince Igor