Mount Beauty stole top spot from Yackandandah in a high-standard match on Saturday.
The Kangaroos had a three-point leading heading into round 11, but the Power's batting proved too strong in the six-wicket result.
Yackandandah set the visitors an imposing target of almost five runs per over, but opener Greg McLennan led the way with 80 as Mt Beauty claimed the win with 16 balls left.
"We aimed to keep wickets in hand and Greg batted really well, he's been threatening all year, without getting the big score he would have liked, but he was excellent," delighted captain Daniel Saville said.
Yackandandah started superbly with Russell Odewahn and Cameron Evans contributing 83 for the first wicket.
Odewahn struck five fours in his 50, while Evans jumped in with 30.
Lusty hitting from middle order players Mick Walker (31no) and Jay Hillary (30) pushed the team to 4-189 from the 40 overs.
"We bowled well in the middle overs, we were reasonably happy with the score of 189, we knew we could chase that down," Saville said.
And McLennan's highest score of the season was the backbone of the innings as he compiled solid partnerships of 43 with Will Betheras and 48 with Frank Iaria.
The latter (32no) then combined in an unbeaten 63-run stand with Ashan Ranaweera (33no) to guide the team home, with Evans the sole multiple wicket-taker with 2-31.
The teams are fierce rivals and there was one report from the match.
Meanwhile, Eskdale upset Barnawartha-Chiltern.
The home team was skittled for only 93 from 35.1 overs.
Chris Hartshorn (31) was the only player to pass 13, although extras contributed 18.
Haydon Wilson (3-11) and Jamie Baude (3-15) caused the major damage.
The visitors cruised to the target only three wickets down and with 15 overs left, Jackson Ellis chipping in with an unbeaten 38.
Dederang scored a 52-run win over Baranduda.
Bailey Williamson plastered 80 at the top of the order, combining in a 134-run partnership with Tristan Mann, who bludgeoned 77 from 56 balls with five boundaries and four sixes.
Baranduda finished on 6-191 with No.3 Lewis Randell striking 54.
And Kiewa belted Bethanga.
The cellar dwellers were rolled for just 88 as Jacob Barber claimed three scalps.
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Kiewa required only 18 overs, with Josh Warren hitting eight fours in his 42.
The ladder after round 11 (in an 18-round season) is: Mt Beauty 42, Yackandandah 39, Kiewa 36, Barnawartha-Chiltern 36, Dederang 33, Baranduda 30, Eskdale 27, Bethanga 15.
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