|LV= County Championship Division One, Arundel (close, day three)|
|Durham 301 & 413: Muchall 115, Hastings 91; Magoffin 5-89|
|Sussex 201 & 114-2: Wells 53 not out; Coughlin 1-3|
|Sussex require 400 to win|
|Durham 6 pts, Sussex 4 pts|
Gordon Muchall made a century as County Championship leaders Durham set Sussex a target of 514 to win at Arundel.
Having resumed on 168-6, 268 runs ahead, Muchall hit 115 and put on a century stand with Paul Coughlin (64).
Australian paceman John Hastings then smashed 91 from 72 balls, before the visitors were bowled out for 413.
Needing to survive more than four sessions to get something out of the game, Sussex lost Michael Yardy and Matt Machan to reach 114-2 at stumps.
Muchall's first Championship century of the season helped Durham to surpass 400 runs for the first time since they drew with Middlesex in June 2014.
|Sussex would need to break records...|
|The highest successful run chase in English domestic first class cricket came in 1925 when Middlesex made 502-6 to beat Nottinghamshire|
The middle-order batsman reached the milestone from 215 balls, before he was trapped lbw seven deliveries later by Luke Wells.
Hastings was bowled by seamer Tim Linley two runs shy of equalling his career-best score, but his attacking innings had taken any realistic chance of winning away from Sussex.
The visitors' chances were further improved as Yardy (28) and Machan (24) both fell after getting starts, but Luke Wells's unbeaten 53 means Sussex will retain some hope of salvaging at least a draw.
Sussex all-rounder Luke Wells:
"The pitch is easier to bat on than the first two days.
"It's become a typical Arundel wicket in that you are almost battling with yourself, making sure you don't take risks and give your wicket away because when the wicket is like it is now it's hard for a team to blast you out.
"We've made a decent start and it's just a case of ticking off the overs tomorrow, the scoreboard almost becomes irrelevant.
"It's been a tough season for our batting unit. We have played on some interesting wickets but this is an opportunity for us all to get some runs and form to take into the rest of the season."
Durham batsman Gordon Muchall:
"We're massively in the box seat needing eight wickets and we're confident going into the last day but I don't think it is going to be as easy as we thought.
"They still need 400 which is a monumental task but this is a quick-scoring ground and if two guys get in it will be hard work because the pitch has lost a bit of pace.
"I'm delighted to get my first hundred of the season. All our batsmen have contributed at some stage so far to getting us to the top of the table and it was my turn today.
"It will mean even more if we're sitting in the dressing room at the end of the game with a beer singing the team song because we've got another win."