 Following his father's death in 1057, the child Boris was debarred from his inheritance.He died fighting against his unclesVsevolod Yaroslavich, Prince of Chernigov and Izyaslav Yaroslavich, Grand Prince of Kievon 3 October 1078.Boris was the son of Vyacheslav Yaroslavich, Prince of Smolensk, a younger son of Yaroslav the Wise, Grand Prince of Kiev.