East Sussex League: Glynde will go into the final day of the season just seven points ahead of title rivals Chiddingly.
Both recorded maximum points victories at the weekend to take the championship battle to the last Saturday of the campaign.
At the other end of the table it is just as exciting. DPB (Eastbourne) were relegated while just three points separate Herstmonceux, Newick and Ringmer in the battle to avoid the second spot.
Glynde swept Crowhurst Park aside to keep their title challenge on course.
Visitors Crowhurst were dismissed for 129 with Adam Davies (5-32) and Dale Tranter (3-46) doing the damage. Glynde then knocked off the runs without losing a wicket as Dominic Shepheard (91 not out) and Joe Adams (32 not out) eased them home.
Chiddingly maintained the pressure but made hard work of their win at Newick. Rupert Thacker hit 40 for the hosts but they were dismissed for 100 with Martin Hole taking four wickets.
Toby Sawry-Cookson hit 35 in reply but Chiddingly were in real trouble as they collapsed from 44-1 to 70-7 with Mike Radford taking 6-24. Skipper Tom Carr, though, held his nerve to see Chiddingly to 101-7 with 28 not out.
DPB were relegated despite a nine-wicket win at home to Herstmonceux. The visitors were skittled for 94 with James Bentley taking 5-34 from 24 overs, then Terry Penfold hit 65 not out to usher the home side to victory.
Seaford recorded two wins over the weekend to lift themselves out of the bottom two and into third place.
On Saturday, Chris Stanyard (6-19) and Paul Mason (3-26) combined to dismiss Heathfield Park for 74, then Jamie Goddard led Seaford to a six-wicket win with 25 not out.
In a rearranged game with Ringmer on Sunday, Tim Goddard top scored with 39 not out as Seaford were restricted to 150-9, with Andy Smith taking 4-23. Stanyard then weaved his magic again, claiming 5-28 to dismiss Ringmer for 109 and ensure Seaford's survival for another season.
Ringmer enter the last day of the season in the second relegation spot, although they are level on points with Newick and just three behind Herstmonceux.
Sunday's defeat for Ringmer followed an exciting draw with Fletching on Saturday. Stand-in skipper Dave Meacher hit 52 in Fletching's 173 with Murray Barnett's 3-35 being the pick of the bowling.
Neil Linstrem hit 45 and Barnett 34 but Ringmer finished on 171-9 as they failed to make the necessary four to win off the final over. Ali Horscroft took 3-14 and brother Grant 3-48.
In division two, Iden were promoted following a draw at third placed Ditchling and they will be joined in the top flight next season by Hellingly, Ditchling or Barcombe.
Contributions from Neil Cloute (69), Michael White (47) and David White (46) helped Iden post 235-7, with John Norfolk's 3-48 being the pick of the bowling. Johnny Atkinson struck 83 in reply as Ditchling reached 219-8 at the close.
Second placed Hellingly held on for a draw away to bottom side Wadhurst.
Brough Cooper struck a splendid 127 not out, sharing a third wicket stand of 151 with Mick Smith (33) as Wadhurst posted 264-4. Neil Green hit 64 in reply but Hellingly were in real trouble at 96-6 and 142-8 until opening bowlers Dave Pye (51 not out) and Clint Mooiman (29 not out) dug in to ensure maximum batting points and a draw at 231-8.
Hellingly are now four points ahead of Ditchling and 11 clear of fourth placed Barcombe who won by seven wickets away to Uckfield Anderida. Keith Hunter (4-15) and Paul Coppard (4-34) combined to dismiss Uckfield for 110, then Joe Wheatley (36 not out), Keith Savage (33) and Coppard (24 not out) led Barcombe to victory.
St Peters still had a mathematical chance of going up after a draw with Battle. Richard Dale top scored with 55 as Saints made 213-4. Battle slumped to 93-8 in reply despite 47 from Aussie Rob Quiney but Phil Harrod (68 not out) engineered a recovery to secure a draw at 181-9. Simon Coomber took 4-35 for the hosts.
Lewes St Michael's remain in the bottom two after a 135-run defeat at Rottingdean.
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