▁Six ▁days ▁later , ▁Nicholas , ▁no ▁longer ▁Ts ar ▁and ▁addressed ▁with ▁cont empt ▁by ▁the ▁sent ries ▁as ▁" N ich olas ▁Roman ov ", ▁was ▁reun ited ▁with ▁his ▁family ▁at ▁the ▁Alexander ▁Palace ▁at ▁Ts ar sko ye ▁S elo . ▁He ▁was ▁placed ▁under ▁house ▁arrest ▁with ▁his ▁family ▁by ▁the ▁Pro vis ional ▁Government . ▁ ▁The ▁immediate ▁effect ▁of ▁the ▁February ▁Revolution ▁was ▁a ▁w ides p read ▁atmosphere ▁of ▁el ation ▁and ▁excitement ▁in ▁Pet ro grad . ▁On ▁, ▁a ▁prov is ional ▁government ▁was ▁announced . ▁The ▁center - left ▁was ▁well ▁represented , ▁and ▁the ▁government ▁was ▁initially ▁cha ired ▁by ▁a ▁liberal ▁arist ocrat , ▁Prince ▁Georg y ▁Y ev gen iev ich ▁L v ov , ▁a ▁member ▁of ▁the ▁Constitution al ▁Democratic ▁Party ▁( K D ). ▁The ▁social ists ▁had ▁formed ▁their ▁rival ▁body , ▁the ▁Pet ro grad ▁Soviet ▁( or ▁workers ' ▁council ) ▁four ▁days ▁earlier . ▁The ▁Pet ro grad ▁Soviet ▁and ▁the ▁Pro vis ional ▁Government ▁competed ▁for ▁power ▁over ▁Russia . ▁ ▁Between ▁February ▁and ▁throughout ▁October : ▁" D ual ▁Power " ▁( d vo ev last ie ) ▁The ▁effective ▁power ▁of ▁the ▁Pro vis ional ▁Government ▁was ▁challeng ed ▁by ▁the ▁authority ▁of ▁an ▁institution ▁that ▁claimed ▁to ▁represent ▁the ▁will ▁of ▁workers ▁and ▁soldiers ▁and ▁could , ▁in ▁fact , ▁mobil ize ▁and ▁control ▁these ▁groups ▁during ▁the ▁early ▁months ▁of ▁the ▁revolution   – ▁the ▁Pet ro