Jayne Bradley, of Easebourne, is in devastating form after hitting her second century of the season.
She managed 124 not out against Rustington in the West Division and was well supported by Ruth Piles, who made 90.
Carol Nichols was the star of the match for Trinity against Wisborough Green.
She top scored with 53 not out and then took five wickets.
Angmering maintained their winning ways with victories over Graffham and Ashington.
Ashington proved tough opp-osition but good bowling and a run out by Sue Crossen turned the match.
SUSSEX ASSOCIATION Representative match: North Division 352 (Reed 165, Hemsley 53, Goldsmith 5-101), Mid Division 100 (Weller 7-59).
West Division: Rustington 191 (G. Hobbs 75), Climping 203 (J. Rees 72 not); Graffham 94, Ang-mering 185 (M. Mantle 74); Stedham 126 (C. Nichols 5-47), Trinity 48; Rustington 143, Easebourne 243 (J. Bradley 124 not, R. Piles 90); Angmering 189 (M. Mantle 95, K. Chapman 82 not), Ashington 124 (S. Crossen 5-9); Trinity 173 (C. Nichols 53 not, M. Bryant 5-57), Wisborough Green 91 (C. Nichols 5-37); Stedham 140, Climping 142 (S. Matthews 79 not).
Central Division: Blackstone 147-3 (Janman 58 not), Partridge Green 114-9; Bolney 134-5 (Malins 55), Hurstpierpoint 155-5 (Dryland 82); Clayton 175-2 (Irwin 61 not), Lindfield 96; Crawley Down 117 (Parrett 53, Gann 6-51), Handcross 140-7; Horsted Keynes 228-1 (Bravo 128 not, Scott 81), Balcombe 141-6 (Brown 66); Bolney 137-9 (Mellish 7-50), Handcross 238-1 (Marks 139, Gann 66); Clayton 114-5, Horsted Keynes 184-5; Hurstpierpoint 172-2 (Dryland 84), Crawley Down 137-5; Lindfield 133-1 (Batchelor 70, Harsant 54), Blackstone 232-0 (Janman 82 ret, Adshead 56 ret); Partridge Green 151-3 (Taylor 78 not), Balcombe 146-8 (Mitchell 74).
Juniors: Clayton 73-8, Horsted Keynes 149-3 (Jenkins 59); Hurstpierpoint 95 (Russ 7-32), Partridge Green 156-4 (Ansell 52 ret).
Mid Division: Plumpton 115, Isfield 107; Wealden 139, Wivelsfield 123; Ditchling 177 (Harrison 58, Stratford 58 not), Barcombe 159 (Ridley 59); Plumpton 91, Wiv-elsfield 99; Isfield 114, Barcombe 111.
CHANCTONBURY LEAGUE League placings: Aldrington 10 pts (5 matches); Eastergate 6 (3); Amberley 4 (3); clapham 4 (2); Steyning 4 (3); Burpham 2 (4); Pulborough 2 (4); East Preston 0 (3).
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