He was installed by Levan II Dadiani, Prince of Mingrelia, in place of his deposed predecessor Simon I Gurieli.
He was installed, in 1626, by Levan II Dadiani, Prince of Mingrelia, who had defeated, dethroned, and blinded his brother-in-law Simon I Gurieli.
At the battle of Bandza in June 1658, Alexander won a decisive victory and established loyal regimes in Guria and Mingrelia.
He then secured support of the Ottoman pasha of Akhaltsikhe Rustam, a Muslim Georgian, and capitalized on the anarchy in Imereti following King Alexander's death to attack his rival prince Demetre Gurieli in 1660.
Kaikhosro's triumph was short-lived; he was treacherously murdered by the Gurian nobleman Machutadze and Guria reverted to Demetre Gurieli.