County Championship Division One, Guildford
Close, day three: Lancashire 485-7, Surrey 430-5
Lancashire 4pts, Surrey 2pts
Kevin Pietersen hammered a sensational double hundred as Surrey replied to Lancashire's huge total in fine style.
The visitors, resuming on 425-7, added a further 60 runs before they declared on 485-7 with Steven Croft, 104 not out overnight, reaching an unbeaten 154.
Surrey, struggling at 49-2 when Pietersen arrived, ended the day on 430-5 with Pietersen unbeaten on 234.
He hit eight sixes and 30 fours in his 190-ball innings as a stunning 495 runs were scored on day three at Guildford.
Zander de Bruyn weighed in with 94 and Jason Roy scored 38 as Surrey, seventh in the Division One table, claimed maximum batting points for the first time this season.
The hosts needed to reach 336 to avoid the follow-on and they looked in trouble when Rory Burns was out first ball before Zafar Ansari (21) was also dismissed cheaply.
But Pietersen warmed up for next week's first Test against South Africa with the highest score by any batsman in the 2012 County Championship season.
His next target will be to pass the highest score of his career, the 254 not out he made for Nottinghamshire against Gloucestershire in August 2002.
VIEWS FROM THE COMMENTARY BOX
BBC Radio Lancashire's Adrian Harms:
"Lancashire will be very pleased they don't face Kevin Pietersen every week.
"With Surrey 47-2 in response to Lancashire's 485-7 declared, Glen Chapple would have probably felt his side couldn't lose and might even win this match.
"But that was reckoning without Pietersen, who destroyed the Lancashire attack with a magnificent display of ferocious hitting.
"The balance of the match has now changed completely, and, if Pietersen continues in this vein tomorrow, Lancashire could face an uncomfortable time batting for a draw late on Saturday afternoon."