(CNN) -- Kevin Pietersen scored an unbeaten double century as England built up a commanding 306 runs lead after the third day of the second Ashes Test at the Adelaide Oval on Sunday.
Pietersen was 213 not out with Ian Bell on 41 when rain washed out play after tea with England 551 for four wickets in reply to Australia's 245.
England will look to press on the final two days for a victory to put them 1-0 ahead in the five-Test series, but their hopes could be hit by an indifferent weather forecast.
"I think rain, no rain there's a really good chance that we can win this Test match," Pietersen told Sky Sports.
"We believe there's enough time to win the Test match."
Pietersen joined teammates Alastair Cook and Paul Collingwood, Walter Hammond (3) and Reg Foster in the exclusive role of honor for England players to hit double tons in Tests in Australia.
England lost Alastair Cook for 148 in the first session but Pietersen found willing support from Paul Collingwood (42) and Bell.
Cook edged Ryan Harris, again the pick of the Australian attack, to Brad Haddin, but has now scored 450 runs in the series for just twice out.
But Pietersen was in his best attacking form and hit 31 fours and one six off spinner Xavier Doherty.
He shared a third wicket stand of 101 with Collingwood before the Durham batsman was trapped leg before wicket by Shane Watson.
But Bell and Pietersen piled on the agony with another century stand until he weather intervened in the final session.
England have now racked up 1,068 runs in their last two innings of the series for the loss of just five wickets.
Australian captain Ricky Ponting, under pressure after seeing his side slip down the world rankings, knows his team will have to bat superbly in their second innings to salvage a draw.
Australian problems are made worse by an injury to opener Simon Katich, who as an Achilles problem and needed treatment on the third day.
He is likely to be in action early on Sunday with England captain Andrew Strauss set for an early declaration with his team in such a strong position.