sentences:  Nevertheless, in 1589, Alexander II of Kakheti officially pledged his allegiance to Tsar Feodor I of Russia, but the alliance was never actually implemented in practice.With Alexander's murder in an Iranian-sponsored coup staged by his own son, a Muslim convert Constantine I, in 1605, the fortunes of Kakheti began to reverse.The people of Kakheti refused to accept the patricide and overthrew him, forcing the energetic Safavid shah Abbas I to reluctantly recognize the rebels’ nominee and Constantine's nephew Teimuraz I as a new king in 1605.